Home Forums Reloading Big Game Rifles 280 Pet Loads...let's see'm....

Got my new 280 up and running, and actually hit the range yesterday.

First shot out of the bag was a ladder of RL19 and 140 Accubonds, seating them .005 off of the lands.

Velocity results were as expected, accuracy left much to be desired.

I know the build will shoot, so I am thinking I need to try faster and slower burn rates than RL19 to see what it prefers.

How about this : H4350, H4831SC or RL22 ???

Don't have much IMR 4350 or 4831...

What say yea ?

TIA,

Tony

Terry,

If you have any on hand, give 7828SSC a go. Stellar performer in a couple of .280s for me with 150 grain bullets.

I actually do have 7828SSC...care to share what you are shooting ??

TIA,

Tony

Tony, (apologies)

In three Winchester 70s I've worked with I shot the 150 Ballistic Tip. Start at 58.0 and work yout way up to 60.0.

All the rifles I worked with took 60.0 with no signs of pressure over a chronograph.

I've had good luck with H4831SC and Sierra 160 gr gamekings, and RL22 with 139 and 154 Interbonds....

I this particular rifle build, I am thinking that slower burn rate might be better...

Tony

Barnes 120gr ttsx over 57.0 grs of RL-17 Federal case WWLR primer. Perfection in my Rem mountain rifle.

H4350 in the 54-55 gr area should be good. AB is one long skinny bullet. Seat mine max for magazine in my pre 64 and still a long jump to the lands in this rifle. Shoots well less than MOA so much for seating depth.

56.5gr IMR4350 with 140gr TTSX and Sierra PH, and 60gr IMR7828SSC with 162gr A-Max. Brass is on its 10th loading and still going strong...

I like 50.8 of RL 19 with 154gr SST's

What are most using with 140's?

Tony

RL-22 is always #1 for me with any bullet over 100 grains; 7828 SSC has also done very well, but really, I've never seen '22 not work across a half dozen 280's.

Have also done some recent work with Win 780 & it looks good so far.

MM

IMR4831 55-56gr with various 140's has been a solid performer.

IMR7828ssc with 150gr and heavier.

RL19 and RL22 were both accurate but not very fast for me compared to other powders.

Don't give up on the load you are using. I just think that you are way too close to the lands for that rifle. The Accubonds act like monometals in some rifles and like a decent jump into the lands. I have two rifles that show this. One is at .086" off due to magazine length, the other is at .084" because it shoots the best there. Both rifles are consistent 1" and under shooters for me and have shot several 3-shot groups in the .3's.

I would back them off to at least .030" to start with.

Thanks for the advice..

Tony

I like the 154 Horn in my M70 Fwt

50.5-51/I4350 will be a sweet spot..get the best load and then fool with seating depth.

Contrary to Goose, mine likes it close .oo4-.005 off.

53.5/R19/160NP also likes it close.. .004 off

No experience with R22 or AB's, but 2 here like it and you have R22. So for me I would start like Goose says, get the best load, and work the depth with .005 increments.

For some reason I seem to have more trouble developing good loads in the 7mm's, and for me that is the 7-08, 280, 7x57, and the 7Mag.

My .280 likes 58.0gr of RL17 and the 120gr TTSX.

What kind of velocities are you getting?

Hicounty, the .280 is not much different than the .270. Both do well with the 4350's and the 4831's especially with the "lighter bullets". If you were thinking 160gr. bullets, then IMR7828 and R22 might be a good idea. But I've seen rifles that broke all the rules about what was supposed to work.

I use 59 grains of H4831 behind a 120gr Nosler Ballistic tip, never had a white-tail take more than one step. Shot a 175 pound doe this fall at 325 yards, fell right over, it never new what hit it.

RL22 is first, last and always for me in the 280 Rem with 140's.

I have had good luck with 150gr nbt and 54.5gr of imr4831.
Not sure of fps, but I've had good groups on targets and great results on deer. I am going to try the 150 partition with this loading as well. Also I have been just using the suggested cartridge length in the nosler book.
A.B.

58gr H4831 under Sierra 140 BTSP and RL22 under Horn 162gr BTSP, also 56gr H4831 under 150gr Nosler Partition

57gns RL19 with 140gn Accubond or 145gn Speer BT Spitzer

I have an old Remington 7600 made in late 80's that likes 53.5 grains of IMR-4350, Hornady 139 BTSP, Remington brass, and CCI 250 primers for a chrono'd 2888 f.p.s. This load is consistently accurate. I may try the 140 Nosler Ballistic Tip out of it just for the heck of it.

Range update......

Ran through a ladder of H4831sc, 140AB, CCI BR2, I moved the seating out to .010.

58.0 of H4831sc gave me about .7" group and 2990 MV.

59 and 60 gave 3050 and 3100 respectively, but the groups opened up to about 1".

I stopped at the clubhouse after I was finished and picked up a bottle of RL22.

Going to try that next.

I am getting the feeling that this rifle likes burn rates on the slower side.

Tony

I agree. I went through this same drill with the 280 years ago,when RL22 was new on the market.

I tried IMR4350,which gave great accuracy and low velocties(pushing harder gave pressure signs);then to IMR4831,which gave somewhat higher velocities but accuracy soured.

I noticed that some sources used MRP with good results, but it was not commonly available, so tried RL22,which was similar but not the same.

RL22 proved to be the ticket, giving vels in the 3100 fps range and excellent accuracy(bug hole type)with 140 Partitions and BBC's.

Found pretty much the same in other 280's as well.

A pal recently wrung out a KS Mountain rifle in 280...I told him to try R22;he insisted on R19.....which seemed OK until he burned R22,which was visibly better.

Can't guarantee the same results from all 280's,but if I bought a 280 tomorrow R22 would be first up,and I doubt I'll have to look much further.


I'd burn it with a Fed215 mag primer as well.

For some reason R22 and Fed 215's are a safe place to start in the 280 and 7RM.The combo is not chump change in the 270 Win either.

Would be unusual but that rifle might not like Accubonds??? It might also have something to do with the twist rate of the barrel?? Might be set up for heavier bullets?? You just got to find the right combo. I'd keep the seating depth just kissing the lands. The most acurate load I have ever seen out of any 280 is RL-22 & Fed 215 pushing a 150 Ballistic Tip. A true 1 holer load out of my Bansner. I'm just as sure a 150 Partition will do just as well. I always run magnum primers in my 280s. I've got a bunch already loaded if you want to try em out. I need to hit the range soon too... when you goin again???

Then again it could have something to do with the time i bent the barrel slammin it into a tree!!!!!

Ah, that explains why i have to aim 10ft to the rignt in order to hit the target!!

Maybe you should recount your "adventure", with a confirmed one hole rifle on one of the biggest bucks you've ever had in the crosshairs !!

BTW, Sat. morning was a perfect day at the range. Had Culver all to myself and had 5 rifles in tow....

My brothers 300Win was the star of the day. Loaded up another batch of 165AB for his rifle, nice little .5" cloverleaf. Remember, that is the rifle that he sent to Mcwhorter to have a new FACTORY take-off fitted to his rifle. It is scary accurate and is a testament to Mcwhorters work.

I doubt that you could have a Lilja et al. shoot any better.

Also got my 7STW back from Kampfeld, but am waiting for a new scope to come in before I shoot it. Came out awesome....

You owe me lunch (not sure why, but I am sure you do !!!)

Tony

PS: This gun will shoot 140ABs, I have pics from the original owner of bughole groups with Fed premium 140ABs factory loads...

Tony

You'll never see me put that "adventure in print...it is bad enough to have to look at the mounted buck when I go over to MBs house and have him re-tell it laghin his arse off the whole time!!! I may try to hit the range Wed if you are interested. We'll wrestle for lunch. I'm planning to go to W Va. this weekend for some shooting & plantin!! Sam

I had 2 280's that liked RL-19 with 140 partions

Ruger MKII 140gr Partition max load RL-19 1" @ 100 yards

Remington 700 same bullet max load RL-19 3/4 @ 100 yards
160gr Partition max load IMR 4350 1" @ 100 yards
with these 2 loads I had the same point of impact at 100 yards

Hicountry: My custom 280 Remington just loves Nosler 140 grain Partitions in Remington cases with Remington 9 1/2 primers and IMR 4831 powder.
I would say it would be worth a try getting some more IMR 4831 and thoroughly testing it.
Best of luck to you.
Hold into the wind
VarmintGuy

tag

How about with 120's? I have some 120gr NBT I was thinking of using in on a SD deer hunt this fall if I'm lucky enough to draw.

VV N165 works very good in my 280 AI. See no reason why it would not be a viable alternative for the 280 Remington.

Imr 7828 has produced stellar velocity & accuracy in one of my 280's with 150 Partitions.

I loved the 150 BT's and 4831sc I loaded last year.

TZone- My rifle really likes 120's with H4350.

I run the Imp case, but I'm sure it'll be fine with a skosh less powder.

What Jordan said. powdr

Thank you!

This will be the first cartridge I've reloaded so fingers crossed.

I'm going to shoot it with 140fed Fusions tomorrow because that's what I have on hand from my last .280, to get it on paper.

My first big game rifle was a 280 Rem CS (22" barrel) and it took the brunt of my reloading experiments as well. That was many years ago, but my pet load was;

139 gr. Hornady SST
57 gr. IMR 4831
WW Nickle brass
Fed 215 primer
COL = 3.345

It put them into 3/16" and I'm a poor shot. The rifle was stock except for a free float and glass bed.

These are all from the same rifle,

140 Nosler Part.
57 gr. RL 19
RP brass
210 M primer
COL 3.275 ...... .75 groups. (3035 fps)

150 Nosler Part.
57 gr. IMR 4831
210 M primer
WW nickle brass
COL 3.30 ........ .25 groups

160 Sierra BT
53 gr. RL 22
RP Brass
WLRM primer
COL 3.275-3.280......... . 75 groups

139 gr. Hornady SST
56 gr. IMR 4350
WLR primers
COL 3.33 .......... 1" groups

139 gr. Hornady SST
56 gr RL 22
WLR primer
RP brass
COL 3.33. ......... .25 groups

150 gr. Nosler Part.
56 gr. RL 22
RP Brass
WLR primer
COL 3.310........ < 1"

This is what it shoots now,

140 gr. Barnes TSX
57.5 gr IMR 4831
RP brass @ 2.530"
WLRM primer
COL 3.250" ........ .5" groups

And a varmint load,

100 gr. Hornady HP
60 gr IMR 4350
WW Nickle Brass
WLRM primers
Gave .5" groups @ 3320 fps

I worked up to Nosler's max load using IMR7828SSC and the 150 gr. AB data and the 150 gr. ABLR bullet. Velocity was 3010 FPS Accuracy not so hot. Have a test series with various seating depths to try. It's my understanding that the ABLR bullets can be quite finicky regarding seating depth. Fairly short bearing surface on that bucket so not much to play with.
Paul B.

I'm using 61 gr of H4831 with a 140 Accubond for about 2975 fps with good accuracy in a Rem 700.

58.5 of H4831 sparked by a cci 250 topped with 150 gr B-tip makes 3/4" and less groups for me 'probably better when I do my part'.

Chrono'd the load starting at 2790 with a clean barrel. At the end of the ten shot trial velocity was still climbing @ 2850 and group size a tight 3/4".

First animal I killed with this load was a 300 lb dressed, skinned hanging carcass weight bull elk. First shot exited w/ a broadside mid-lung hit with a 1-1/2 inch exit hole from 80-ish yards. Second shot a B-tip angled in from rear of rib cage to BREAK the off shoulder and lodge under the hide with the core out of the jacket. He tipped over very shortly after. Second shot was not needed but elk started to head for a STEEP ravine and not good terrain.

I was a devout partition shooter for elk, but with different reports and smoke curling up from credible individuals and others about today's mid-caliber B-tips being used more and more on large game plus deer I had to see for myself.

145 Speer Hot Core with IMR4350 has been a steady performer for me for decades.

Just for grins (and because I've heard so many good things about it on the 'fire), I'm going to try the 120gr BTip with 4350.

Same for me but H4350

Mine likes 56grs IMR4831 with 140gr Ballistic Tips, Accubonds,or Partitions seated .020 off lands. Velocity is 2990 and 1/2" groups for all three.

I did it this weekend end. I'm going to have to look at my notes but I got better accuracy results with loads in the middle of the pack. The more it was pushed, the more accuracy opened up. I think (going from memory right now) on the max book load I had 1.5" group at 100 with IMR-4350.

Thanks for the data. Posted so I can find later!

The two loads I have worked up for the wife's 280 with 23" barrel are 59 grains of h4831 and 140 grain accubond for 2980fps and 56 grains of h4831 topped with a 160 grain accubond for 2870fps. Not sure which one I'll have her run for an all around load for antelope through elk but I'm leaning towards the 160 grain accubond

Around 60 Gr of RL 22 140 Gr Nosler E Tip great accuracy around .5" but shows pressure. Going to reduce it and try keep accuracy 24" LH KS Rem 700. Load shoots great in my wifes RH Ruger SS Hawkeye 22" 280 Rem also.

H4831sc & 154 interlocks

Old thread..........here are some additional loads tests done since my original post on it.

I pretty much use NBT's for testing, whether I intend to hunt with them or not.........never had a case of major deviation from what I see with them to most other bullets.........and in the rare case that I do, I then know that I likely have a bullet problem.

MM

I'm thinking enough RL22 to get a 150 NBT to 3,000 fps and I'll call it good. Maybe try Ramshot Hunter. Anyone used H-1000 with a 150?

I found a CDS dial for the 150 NBT at 3,000 in my scope drawer so will slap that on a VX3 3.5-10x40 and give her a try. Getting my KS geared up to shoot over New Years weekend!

Let us know if you make 3000 with a 150.............I've not been able to make myself push that hard in several 280's.

About 2950-2975 is a far as I've been able to make myself go.

I would love to get a hold of some RL-26 as I think that might be a better powder choice, but it been like un-obtainium.

MM

Yeah, RL-26 might do it...

As of this morning, Re26 is my preference for .280 Remington, so my H4831SC will be relegated to other duties.

I'm playing with one of the Model 70 Super Grades commissioned by Midway. I've been working with it for several months. It became apparent right off the bat that the velocity potential was outstanding with Re26 and 3000 fps was easily within reach with a 150-grain Partition. Having chased velocity before and ending up overly frustrated, I kept looking for *the load* at around 2930 fps, where I thought there was something promising. It just didn't work out so I went ahead and bumped the charge up. I had seen that seating about .031" off the lands seemed to work so I stuck with it.

So, this morning I had six rounds each at three charge weights, intending to shoot two three-round groups of each charge. Someone is bound to ask, so I'll reveal that the charge weights were 61.1, 61.3, and 61.5 grains. As I shot them, the groups got tighter as the load got hotter. At 61.5 I got a group measuring .78 inch and one measuring .70 inch. The groups superimposed measure about .80 inch. Velocity was measured with a Oehler 35P about 15 feet from the muzzle and averaged 3006 fps for this load. Extreme spread for the six shots was 14 fps. SD may be pretty meaningless for six rounds, but since the chronograph gives it to me free I record it, and it was 5 fps this time out.

I'm plenty happy with this and intend to load all my .280 brass up with the load and go out and kill stuff with it.

I forgot to mention that my Model 70 has a pretty generous chamber and a 24-inch barrel. Fireformed R-P brass had a capacity of 69.0 grains of water when fired in my old VZ24 econo-custom, and the same R-P brass fireformed in the Model 70 would hold 70.4 grains of water. I am using Nosler brass now, and it's capacity is 72.0 grains of water when fireformed to the Model 70's chamber. That could be important.

59.5 gr of H4831 and a 140 nosler leave ragged one hole 3 shot groups out of my m70 FWT

139SST with H4831

150NBT with 57.5 gr RL23

More proof of life after death. Thread started 3/5/11.

With that said, I like 57.8 gr. WMR (Winchester Magnum Rifle) for 2907 FPS on average. rifle is a DWM Argentine Mauser custom, 24" barrel. Groups run ,50" to .75" depending on how well I'm doing on a particular day.

The good news is I have a good supply of WMR. The bad news is Winchester discontinued it over 15 years ago. FWIW, it works great in the .270 Win., .280 Rem., and .300 Win. Mag. It absolutely will not work in the 30-06. In fact Winchester only gave data for 200 and 220 gr. bullets for WMR. I tried working up something with 180 gr. bullets and simply put, forget about it.

I only posted the load should someone besides me have a supply of WMR.
PJ

Kind of how the .280 rem rolls, it just cannot go away. 'More proof of life after death.....

Yeah but it's a damn good cartridge. Too bad Remington screwed the pooch by not loading it to its full potential. I just remedy the problem with my reloads.
PJ

I know the 280 well, been running one since 1988.

Been side tracked with other cartridges, none much or any better though....

The 280 is tough to beat! My 280’s liked the 154 grain Interlock, 162 grain Interlocks, and the 150 Partition the best.
One of my first 280’s was a 7x57 before a chambering reamer had its way with it. The best bullet in that 280 was a SPEER heavy Mag-tip - a great elk bullet. AAs I recall it was 160 grain???
The main powder I used in the 280 has been IMR 4350.

The load I'm running in the 280 last few seasons is

H4831 58.5 gr. Fed 210, rem case with a 150 gr. Btip on top. All shots touching @100 yards with 2850 fps chrono'd from the stock Ruger 22 inch barrel. Laid down a few deer and a rag horn bull elk asorted vermin with the load.

All the hype about the 'beefed up' ballistic tips got my curiosity loading. I confirmed they were 'beefed' after breaking the far side scapula of the elk after driving from behind opposite side last rear rib on the elk at 80-ish yards. Zero reservations of using this btip on elk... from my .280.

The 'do it all' for years load....

Imr 4831 56.5, fed 210, rem case 160 gr. Speer Spitz, nosler partition. 2900 chrono'd fps from the ruger again. Clusters one inch @100. Kilt many of elk and deer with a bear thrown in.

There have been some factory loads used also. The ones that I found to be stellar on game are the long discontinued winchester 140 gr. Power point, Remingtons 140 core-lokt and there 165 gr. Core-lokt rn.

The win power point load would flatten deer, 80 lbs or 300 lbs. Found two in deer, one in the neck of a big 5x5 rutted up whitetail and one under the rib hide of the 300lb mule
deer buck. Took big deer to stop'em, both bang flops also.

The lighter core-lokt was like the power point, bang flop. Only found one 140 core lokt in a deer. Looked like the remington picture ad. Found they work very well on mountain lions also. The 165 core-lokt don't care what's in the way, it's leaving a good exit hole. Deer and bear dispatched all had good sized exit, very good blood trail or flopped right there. Have yet to find one in game, maybe that will change when I get to run one into an elk.

Just to pile on a bit, I decided to try out the PRVI Partizan 174-grain SP a while back because my favored 150-grain Partitions seem to have gone extinct and I'm down to a couple hundred of them. An 8-pounder of H1000 came my way several months prior and it seemed like a natural to pair it up with the 174s. At 60.5 grains, 3 five-shot groups at 200 yards averaged a little under 2-1/2" or about 1-1/4 MOA fired out of an econo-custom VZ-24 with an A&B barrel. Velocity averaged about 2770 (sounds awful close to the old .30-06 shooting 180s, no?). I haven't shot the 174s out of my Super Grade; the 150 Partitions are reserved for that rifle.

I plan to murder hogs with this 174-grain slug launched by the VZ-24.

I also laid in a supply of 150-grain ELD-Xs, but have not tried any of them yet. I expect them to shoot as well as the 150 Partitions do using Re26. If not, I can always revert to H4831 or H4350 or even dip into the H1000 if need be. Surely one of the four will be very good.

I ran 57.0grs of IMR-7828SSC and the Sierra 175 soft point Gameking. Chronied 2758fps from a skinny 22" 700 barrel in standard 280 Remington chamber. This load is from the Nosler #5 manual, but I subbed a Sierra instead. They shot excellent. One of the smaller groups my rifle managed. I got a good deal on them at a gunshow and threw this load together to try them out. Typical Sierras. Very accurate. Would make an awesome long range load. Neck and neck for power with a 30-06 and a 180 at 2700 fps, but with a .533 B.C. It takes a 200gr 30 cal Sierra to equal that.

I’ve got two. A 7600 and a 725. Both are great shooting rifles.









M7600












I like them both. Great shooting rifles and easy cartridge, just like a good 270…

Boomwacks 58.5 with the 150 BT shoots excellent in my 7600 as well.

I like that 725 Scotty. I always say if I run across one in 270 or even 280, I'm going to buy it. I saw a 721 the other day, it was chambered in 270 win. I damned near bought it, it's one of those rifles that was hard to give back. Aluminum butt plate, all original stock and nice bluing. Reminded me of an old pre 64 model 70. Now I look on gunsinternational and none of them are in the condition that rifle was in. I don't like 270's or Remingtons, but that one was an exception. $425 far too cheap for that rifle, so it has me thinking!!!!

I love those 725's, very similar to a Model 70 Featherweight to me. My 280's had a recoil pad added, but it shoots just fine as it sits.

Those old 721's were really great rifles for their day and at 425, I think I would have caved.

Man, I almost did. Now I have the regrets!!! I may go there tomorrow!! I really like the 725 because of the safety lever. They took that design from the M1917 I love. Very easy to manipulate. I've heard some guys prefer that style even over the venerable wing safety. Sweet rifles you have there Scotty. Those pumps can be wicked accurate as well. Almost had my azz handed to me by a young dude (I mean got dang country boy) shooting a 760 in an offhand match when I was younger. If it hadn't been for the 1 extra egg I shot offhand at 100 yards, he would have taken home the pot. That sob kept up tit for tat on the 4" steel plates. Not really a challenge for either of us. He knew how to handle that 760 and it was pretty impressive from my standpoint.. Walked away with $150 that day. Made me appreciate the 760 much more after that. They aren't just an "Amish machine gun" or however that phrase goes. I bought one because of that day, but the one I had rattled too much. So I sold it. It was a cool left hand model and it shot very well.

Yeah, the 760's and 7600's are definitely my weakness. I don't have a ton, but I have a short 270, 280, Whelen and a Whelen carbine. They really shoot way above their paygrade.

Bob had a 760 280 Rem carbine I'd give a left nut for.

Oh dang. That would be a cool one. I miss that old guy. He had some cool rifles. I'll tell you, I have a lot more respect for those pump remington rifles. Kind of like I have respect for a rattle snake. Always loved the 870 too.

They are good shooting rifles. My standard 35 Whelen is pretty darned awesome shooting too. Just got the carbine though, that'll just get a peep sight and zeroed at 100 yards. But man is it sure handy. I bet it'll shoot just fine as well.

Very cool man. I always thought rechambering one to 9.3x62 would be bad azzed...

That was my plan when I scored the 760 270 Win. I was going to do a 338-06 or 9.3. Well, I kinda have a soft spot for the 270 Win, so I had the barrel trimmed back to 20" and with 150 PT's it works well as it is... Maybe one of these days I will though.

My wife slums it with lowly classic featherweight in a 280 she’s managed to get couple moose with it. Top secret load is in this thread.

https://www.24hourcampfire.com/ubbt...1617864/re-wife-first-moose#Post11617864

Do you fire it from the hip yelling ‘Merica?

HA! That's cool stuff John.. Looks like it's a go to.. Those 150 Ballistic Tips are damned good bullets.

I use the 140 Sierra's in the M725 and sub a 140 Bitterroot for hunting. Pretty sure for what I am doing the Sierra would work fine as well too. I know RL26 is some sorta quick in that one.

What if I do??? What're you going to do bout it?!?!?!

Mmmmm....take cover??

Here's you two:

https://youtube.com/shorts/STweHyFKjFU

Even a moose has been felled by the 'top secret' 280 load.... Perdy snazzy.

When it was my turn for a moose, I had along my 7 rem mag. Which I call the 280 on steriods....

HA! I am pretty sure John and I are fairly similar and if we were neighbors, your video might be close... Or we may simply have opposing firebases with support by fire positions aimed in on one another.. Who knows?

Cool that this thread got resurrected from 2011 !

280 Remington, 700 BDL, 162 SPBT Hornady Interlock, 53 grains IMR4350, 0.19 MOA - second group .82 MOA same load, third group 1.33 MOA same load - .78 MOA average
280 Remington, 700 BDL, 150 Nosler PT, WLR, 56 grains IMR4350, 0.72 MOA - second group .87 MOA - favorite load
280 Remington, 700 BDL, 150 SPBT Sierra, 56 grains IMR4350, 0.67 MOA - second group .9 MOA
280 Remington, 700 BDL, 139 Hornady Interlock, 54 grains IMR4350, 0.62 MOA
280 Remington, 700 BDL, 120 Hornady Hollow Point, 52 grains H414, 0.88 MOA - 2ea. 5 shot groups - I stopped using this as I found H414 to be sensitive to temperature


This rifle is accurate with most loads, the largest group out of normal (not hot) loads was 1.34 MOA (154 Grain Hornady Interlock & 53 grains IMR4350- the second group with this load was .88 MOA though???)

Exceptions see below:

I loaded a couple loads too hot, and the groups got large - 55 Grains IMR4350 and 154 grain Interlocks & 154 grain SST's*, the groups were as large as 2.65 MOA with these two too hot loads.

*I stopped using SST's when I had poor bullet performance in my 25-06. I sold 10 boxes (different calibers) that I had for a dime on the dollar, and I warned people when they bought them of my disgust with the bullets.

57 Grs. of H4350 and an old 150 gr. Remington Core-lokt was real consistent and around an inch from a crappy, home built 98 actiona nd Apex barrel. I never clocked it and I was fine with the accuracy and consistency.

Sweet

Any 150 scenar loads?

Or 143 hammer bullets?

Here's some loads my favorite 280 likes:
280 Remington 700 BDL, 162 grain SPBT Hornady IL, 53 grains IMR4350, 0.19 - .82 MOA (different times)
280 Remington 700 BDL, 120 grain Sierra HP, 58 grains MR3100, 0.57 - .88 MOA
280 Remington 700 BDL, 150 grain Nosler PT, WLR, 51.5 grains IMR4350, 0.60 MOA
280 Remington 700 BDL, 150 grain SPBT Sierra, 56 grains IMR4350, 0.67 MOA
280 Remington 700 BDL, 139 grain Hornady IL, 54 grains IMR4350, 0.62 MOA
280 Remington 700 BDL, 150 grain Nosler PT, WLR, 56 grains IMR4350, 0.72 MOA
280 Remington 700 BDL, 150 grain SPBT Sierra, 55.5 grains IMR4831, 0.80 MOA
280 Remington 700 BDL, 120 grain Hornady HP, 52 grains H414, 0.88 MOA (stopped using when I found out how temperature sensitive it is)
280 Remington 700 BDL, 140 grain Barnes TSX, 56 grains IMR4350, 0.95 MOA
280 Remington 700 BDL, 154 grain Hornady IL, 53 grains IMR4350, 0.88 MOA

I mentioned earlier that H4831 was a good powder, but MR3100 and IMR4831 are close to H4831. But H4831 didn't make it into the top 20, sorry. The loads in bold are the ones that I use the most.

Exclusively used 120 BT's this last season behind 49.8 RL 15 its sweet in my mountain rifle.

Those are great loads above.

I shot out two 280’s.
I tried heavier bullets but settled on 140’s.
I tried every powder available and got the best results with IMR4831!
H4350 worked well as did R17.
Today I would try R16 which wasn’t available when I was shooting the 280.

Winchester nickel case / WLR / 140gn Accubond / 57gn Re19 / 2929fps.

54 grains of RL 19 and 140 gr TTSX shoots tight groups out of my .280.