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Does anyone have a favorite powder to load under 100gr. Partitions in the .243? I'm leaning toward 7828, but have H4831, IMR4350, RL22, and 780.

Thanks


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Shoot Quit Abit Of RL-22.Mine Likes It.Varget Is My Go To But Saving What I Have Of That For My 250AI.

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H4831 is what I use for 100grainers.


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IMR 4350 seems to group best in my 700 Rem with 9+ twist.

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Dunno how many .243's I've loaded for, but so far either IMR4350 or H4350 has shot well with 100-grain bullets in every one, whether it has an 8, 9, or 10 twist. Generally around 41 grains does the job.


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I've had my best results with one of the 4350's.


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I currently load 100gr partitions in a couple of my 243's and have used IMR 4350 for several years with excellent accuracy.
Although I think if I had to do over again, I might try some Reloader 15 or 22.

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Thanks guys. Since I have 2 unopened cans of 4350, I guess I'll start with that, saving the other stuff for the .270s. Besides the NPs, I've got a bunch of Sierra PHs that I can use for practice. They have a very similar form to the NPs and a a load that's okay with the Noslers should be okay with the softer Sierras.

One good thing is that these powders can be found just about anywhere, unlike a lot of the medium burners.


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The most accurate rifle I ever shot was a 243 loaded with 105gr Speers and a discontinued Winchester powder called 785. IMR4831 was the second choice when 785 was discontinued. I haven't worked with ball powders much since then (30 years ago), but if there is any "magic" in the 243/ball powder combination, I gotta believe there is one out there with characteristics similar to the old 785. Maybe 760 is close? Is MRP still around? Hopefully someone with more ball powder experience will chime in here.


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Any of the 4350s. Personally, I use H4350SC and I find it to be superb.

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I have some 780, which I got for loading 160 NPs in my .270 because it gives top velocities and even the starting load is plenty fast enough for almost anything. The 780 data for the .243 also looks impressive, but the stuff is pretty much impossible to find, so I'm saving it for the .270 loads. You never know when a moose or griz will pop up in WV using one of those trans- continental Bigfoot tunnels that Art Bell used to talk about!


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H4350 has worked very well for me for the 95-100gr bullets. H4831 worked as well. It's hard to beat 4350 as an all around 243 powder.

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Many loads do not completely fill the 243 case. With 100 grain bullets, the maximum load of old fashioned H4831 just nicely fills the case. IIRC, I get 2950 FPS with a 100 grain bullet.


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As long as the case is pretty full, I've not found load density to be a big deal.

I have some capable rifles that shoot little groups with charges that shake quite audibly.

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Originally Posted by Whelen Nut
H4831 is what I use for 100grainers.



Me too......


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I use Varget for all my .243 loads. My favorite bullet is a 95 gr. nosler and I consistently get 3/4" groups with that combination

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41.5 grains of H4350

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I have a 243 that shoots best with 45.5 gr. 7828 with the 100 gr partition.

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I've used powders with burn rates from 4198 to 7828 and every thing in between... ALL of my 243s have been accurate beyond what is needed for deer hunting...only real decision is what sort of velocity ya think ya need...

2600 to 3100 fps or a little more has been quite possible...with no velocity more accurate than the other...

mine are Ruger, Winchester, after market barrels and A Remington ADL...

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Originally Posted by DakotaDeer
41.5 grains of H4350


Same here with either the 100 gr. Nosler Partition or the 100 gr.Hornady SP or BTSP


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I just looked at my .243 notes and found a few interesting things. One is that despite Nosler's manual indicating Vihatvuori N560 was most accurate with 95-100 grain bullets, it's been so-so in the several rifles I've tried it in. Reloder 17 and 22 have been very good in a couple of rifles, but doesn't have the consistent track record of the 4350's.

So far the "voting" (which is what these threads usually are) has gone like this:

7828�1
785�1
IMR4831�1
RL-17-1
RL-22�2
Varget�2
H4831�3
IMR4350�4
H4350�6



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Make that :

H4350-7


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ok, I'll be the outlier. I have an old 243 that loves 4320 and 100gr Solid Bases...and nothing else that I have found.

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Imr4350-5 41.3gr. And 95bt's



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My 100-gr Partition box states 38.0grs IMR-4350.

Have only killed 1 deer with that load, a 3 pt, it was a beauty too, he fell in the 2-track running through a chop field and I backed the truck right up to him.

Mike


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MD, in regard to R17 being very good in a few rifles-good accuracy, velocity, both?

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The best was in a Browning X-Bolt, groups around .6-.7 with 100-grain Partitions at around 3100 fps with the maximum load from the Alliant data, 41.0 grains.


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Thanks kindly.

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I long ago stopped looking for a better powder for the 243/100gr. combo than H435o because it's a waste of time and components.

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Add my name to the H4350 list. It works well in both 243's the wife and I shoot.

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Thanks for the talley, John. I'm going to load some with the IMR4350 and maybe the 4831 until I can find some 4350 of the Hodgdon persuasion.

I tried some H4831SC with 90gr NABs, but accuracy pretty much a disappointment as was the condition of the two I recovered from the damp clay of the target berm. I know it's a tough test, but one pancaked and totally lost its core and the other looked identical, except that the jacket was coated with lead. The partitions (in other calibers) I've recovered from the same place always had the base intact.


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Pappy: yes, partitions are much better for killing dirt than ABs (JK grin )

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This past Friday, I walked into a Clayton, NM gun shop and behold, this guy had a bunch of powder. Nearly dropped by teeth.

Mostly IMR, but a good selection. My bud and I got several cans of IMR 4350, 4831 and 7828. I can't remember when I last saw 4350 on a dealer's shelf, any version. He laughed when I asked about Varget... blush

You just never know where you're going to find some powder.

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Originally Posted by southtexas
Pappy: yes, partitions are much better for killing dirt than ABs (JK grin )


Good thing too as those berms will charge at the drop of a hat.


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In my opinion and experience, H-4350 is the cat's meow for 100gr/243 and 165/30-06.


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Originally Posted by Pappy348
Originally Posted by southtexas
Pappy: yes, partitions are much better for killing dirt than ABs (JK grin )


Good thing too as those berms will charge at the drop of a hat.

Gotta watch them berms what got teeth... wink

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I shoot 42grs of H4350 with a 95gr Nosler BT in my rifle. Good accuracy and velocity.

I tried H4831sc with the same bullet, but both the accuracy and velocity were inferior to the 4350. As many have said, it seems to be THE powder for a .243.


Originally Posted by shrapnel
I probably hit more elk with a pickup than you have with a rifle.


Originally Posted by JohnBurns
I have yet to see anyone claim Leupold has never had to fix an optic. I know I have sent a few back. 2 MK 6s, a VX-6, and 3 VX-111s.
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I hope that proves to be the case for my Sako as well, as the last thing I want right now is a rifle with "issues". I loaded up some with the IMR 4350 I have and if things go well, I'll go on the prowl for the Hodgdon, as most here think it has the edge.

Have you tried the 4831sc in anything else? I am wondering how it compares accuracy-wise to the real stuff.


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One would think Hodgdon has the edge on temp stability. IMR and H versions of 4350 perform pretty close, IME.

You don't see many rounds with such a consensus for a certain powder, as the .243/100 gr. and 4350.

DF

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Seems so DF, but if they used 7828 worked out to max with accuracy they would forget all about using 4350. Magnum Man

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I'd be interested hearing more, as various sources of handloading data don't show 7828 getting more than about 50 fps more velocity than the 4350's.

How has temperature resistance been in your rifles? One of the reasons a lot of handloaders like H4350 is velocities are very consistent over a wide range of temperatures.


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Originally Posted by Pappy348
I hope that proves to be the case for my Sako as well, as the last thing I want right now is a rifle with "issues". I loaded up some with the IMR 4350 I have and if things go well, I'll go on the prowl for the Hodgdon, as most here think it has the edge.

Have you tried the 4831sc in anything else? I am wondering how it compares accuracy-wise to the real stuff.


Accuracy is good in other rifles. Like my 270


Originally Posted by shrapnel
I probably hit more elk with a pickup than you have with a rifle.


Originally Posted by JohnBurns
I have yet to see anyone claim Leupold has never had to fix an optic. I know I have sent a few back. 2 MK 6s, a VX-6, and 3 VX-111s.
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Originally Posted by Mule Deer
I'd be interested hearing more, as various sources of handloading data don't show 7828 getting more than about 50 fps more velocity than the 4350's.

How has temperature resistance been in your rifles? One of the reasons a lot of handloaders like H4350 is velocities are very consistent over a wide range of temperatures.


Good to hear from you JB. What you said in your first sentence is true . IMR 7828 was brought out in late 80's and I started using it with load data from the 1989 IMR manual. They listed 47.0 grs with 100 gr Ptd SPCL 47900cup at 3050 fps in a 22" bbl. A compressed charge. That load shot very well out of my 700 BDL with 100 gr SPCL's and 100gr Horn SP's. My Shooting Chrony showed an avg of 3113fps. The fired primers still had a rounded edge but got a little flatter with RP brass, the WW and Fed brass handled that just fine. A few years later I did a little trading with a guy and ended up with 4 boxes of 100 gr NPT's the older semi-spritzer style. Thinking I might need to back off on the charge going to the NPT I checked the #3 edn of the Nosler loading manual (current then) they had a 47.5 gr MAX charge listed at 3250 fps so mine ended up at 47.4 at only a 3100 fps velocity. hard to compare apples to oranges but their test gun had a 24" bbl, I was handicapped by a stock 22"er .Groups ran 1 1/8" to 1 3/8" 5 shots on a fairly regular basis, as I never try to shoot much over 325 yds with the 6x scope I was using I was good to go for the deer and antelope hunting I use it for. That original data showed me with the 7828 burn rate and pressure shown it would be pretty hard to get enough in the case to get overloaded. The same bullet with IMR 4350 was running 52000 cup at less velocity just about the same as IMR4831. My 7828 loads gave me more than the 50 fps you mentioned safely and with the accuracy desired. Fluke ? I don't know but Nosler #3 listed even more than IMR did with a bullet normally thought to increase pressure. By Nosler #4 they had gone to a full spitzer profile on the 100 gr NPT and backed off to 45.5 grs listing a 24" barrel again. I still use the older lots of powder I have on the shelf so I think the older data is still pertinent and refer to it when using it. For what it's worth about all loading data on the 243 Win took a dump about the same time the worn throat/ pressure increase deal which I'm sure you know more about than I do.
Most of my 243 use has been on antelope as I see it near perfect for that job. When the season rolls on in SD the temp extremes are from low 80's on the high end to a very rare one dipping to the 30's,very seldom hunting antelope below freezing, so I haven't worried about it much. I do like and use H4350,and other Hodgon's powder's all the time.
Hope you and the wife a great and productive fall hunting season. Magnum_Man

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Magnum Man,

Thanks for all the info. Yeah, I wouldn't worry about the temperature deal for typical pronghorn hunting, in fact I use some relatively temp-sensitive powders when after prairie goats myself. Last year Eileen got hers on a morning around 20 degrees, but that was exceptional�and the range was only 150 yards anyway. (She and I each have two tags this year, so will be after them pretty hard.)

Have you tried the short-cut version of 7828? I've been using it in various rounds for the past couple-three years and it seems to work exactly the same, but a little more will fit under bullets in some cartridges--and the .243 with 100-grain bullets would be one.

Good hunting,


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JB ,I have used the SC version of Hodgon's 4831 and it was ok, so at your advice I'll sure try the 7828 SC. No antelope tags in SD this year for me, first time in 34 straight years, I had a tag last year and just too many folks a head of me with a preference point for darn few antelope tags I guess. Last years buck was nice and taken with my M77Mk 2 in 280 Rem with 140gr Nosler Solid Base bullet and H4350(Extreme) at 265 yds. I am sure it will do deer just as well .We are lucky to have the choice in powders and bullets today that we have ,short supply and all. Good luck on those lopes. Magnum Man

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Last night I loaded up some 100gr. Partitions and some 100 gr. Sierra Pro Hunter blems; 4 rounds of each at 38.5, 39.5, 40.5, and 41.5 grains of IMR 4350.

The largest 4-shot group with the NPs was 1 5/16 at 38.5gr.; the smallest was 11/16 at 40.5, with 3 through one hole. The top load group was 1 1/16.

The PH groups ran from 7/8 at 38.5 gr. to 1 7/16 at 40.5, with the top load of 41.5 gr. running an even inch. For some reason, the PHs grouped an inch and a half higher than the Noslers. For the 40.5 grain group, I was holding on the lower edge of the bull, which may account for the larger spread (or not).

For now, it looks like I'll be going with the Partitions over 41 grains more or less. I can' t see flogging a 50 year old barrel to death over 1/4" or 50 fps, especially when I tend to shoot deer at 25-50 yards.

When I was done with the deer loads, 3 rounds loaded with the PHs over 15 gr. of Trail Boss made an almost perfect 1 1/8" triangle- 6 inches low and 2 inches to the right of the aiming point. Estimated velocity of that is about 1600fps. Ought to be fun after deer season.

For the other Berm Killers out there, I regret to report that the only bullet I was able to recover was from one of the Trail Boss loads, which had a slightly bent nose and was flat along one side, so I guess the berm won.

Thanks for all the input.


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I've long been a fan of H-4350, it just seems to give great accuracy in any round where it's an appropriate speed powder. So since I had a jug of it on the shelf when I got my first .243, it was a natural choice. I ended up getting rid of that .243, and then got my son a .243 for his first rifle, both rifles are rem 700's.

For bullets 85 gr and heavier I could dial in moa or better groups with little effort and have tried at least a 1/2 dozen different bullets from various cup-core 100-105's, the 87 V max, 85 partition and 95 tsx.

I'm sure there might be a powder that will be slightly more accurate, or slightly faster, but I like to keep my load work simple, and IMHO H-4350 simply works in the .243.

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Back from the dead for this thread ...... smile

I don't see much if any love for using WW760 or H414 in the 243. Anyone use it at all?

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Of those powders, I’d go with IMR 4350.
I’ve had really good luck lately with IMR 7977.


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I used to use both (same powder) in 243 plus 7x57 and 7mm08. I've switched to H4350 in the 243. Varget works well with 85 grainers. I think Powder Valley has 760 in stock now. H414 was discontinued.

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H-4350, IMR-4350, Accurate 4350, 760, H-414....


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Never tried any ball powders in .243. I had the most success with H4350, IMR7828, and RL22.


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Originally Posted by SuperCub
Back from the dead for this thread ...... smile

I don't see much if any love for using WW760 or H414 in the 243. Anyone use it at all?


When I loaded for a 243 I started with H414... 760 is the same powder... 100gr hndy interlock, shot great, killed stuff. Also used it in a 7 mauser and then 708 with 140gr bullets.

I had H4350 for my 06 and it worked also but stayed with 414 in the other guns as I had a couple pounds to use.

Still have some. Got rid of the 243 and shoot 120gr in the 708 so went to H4895.

If I still had a 243 I'd use the 414 I have.

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Originally Posted by krp
Originally Posted by SuperCub
Back from the dead for this thread ...... smile

I don't see much if any love for using WW760 or H414 in the 243. Anyone use it at all?


When I loaded for a 243 I started with H414... 760 is the same powder... 100gr hndy interlock, shot great, killed stuff. Also used it in a 7 mauser and then 708 with 140gr bullets.

I had H4350 for my 06 and it worked also but stayed with 414 in the other guns as I had a couple pounds to use.

Still have some. Got rid of the 243 and shoot 120gr in the 708 so went to H4895.

If I still had a 243 I'd use the 414 I have.

Kent


My 275 Rigby [7x57] hates 760. I was hoping for other results as I have about 12lbs of it here.

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I use 40-42 grs of Imr-4350/H4350 for 100 grainers. Also good for 95 gr NBT.

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IMR4350 or H4350

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I’ve tried the three 4350’s. I liked all of them. Asked a guy who built custom rifles and loaded for his customers.
I asked how he duplicated a load he developed for a rifle 10 years ago. With the components changing.
He said Accurate 4350 was the most consistent. Hasbeen


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Originally Posted by Mule Deer
Dunno how many .243's I've loaded for, but so far either IMR4350 or H4350 has shot well with 100-grain bullets in every one, whether it has an 8, 9, or 10 twist. Generally around 41 grains does the job.


Same here with at least 4 different rifle, all with the IMR

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RL26

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IMR 4350 for 100 gr. NP and 75 gr. Hornady HP.

24" barrel Hart bbl. w/ 1-10 twist.

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Imr4350 with 100gr partitions. Always shoots through whitetails for me.

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I use H4350.

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I did not read the whole thread so this may have been posted. Sierras accuracy load for the 100 gr bullets is H4831sc 43.2 grains for 2950. I know he was talking about partitions but the topic came up of shooting Sierras for practice.



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Originally Posted by alpinecrick
Originally Posted by Whelen Nut
H4831 is what I use for 100grainers.



Me too......


That's what I used as well, when I was loading for a couple of .243's. (Never owned one myself.) Shot well and my brother and my friend were extremely happy and successful with the results.


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Since someone decided to revive this chestnut of mine, here’s what I have loaded at present. Different rifle though.

[Linked Image]


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Can't remember if I already commented on this old thread, but will again. Have tried a bunch of powders in a bunch of .243s with bullets around 100 grains since buying my first .243 in the 1970s (a Remington 700 BDL), and while several powders have worked, I started with IMR4350, and have yet to find one that didn't shoot well with it.

Lately have switched to H4350, which does just as well. An example: Eileen's lightweight Husqvarna came to us just before hunting season a few years ago. Actually I bought it off the Campfire classifieds, just because it was a great deal--but she picked it up one day, noticing it was a "new" rifle in the house, and liked the way it felt so much it became hers.)

Anyway, there wasn't much time before hunting season, so I tried 42.0 grains of H4350 and the 100-grain Partition. The first group was well under an inch, but I didn't chronograph it, after long experience guessing the muzzle velocity was around 2900. She killed a pronghorn at 243 lasered yards a couple weeks later--and a year or two afterward killed her biggest-bodied whitetail buck with the same load.

Later on I did chronograph it, and velocity was just about 2900.


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I bought several pounds of IMR 4451 a while back while the getting was still good. The 4350's were already dried up around here. My 243 is doing quite well with 41.8 grains under a 95 grain Partition. This is in SIG brass and lit by a 210M.

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Am not surprised!

Have gotten just about the same results from 4451 as IMR and H4350 in a bunch of rifles.


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Originally Posted by Mule Deer
Dunno how many .243's I've loaded for, but so far either IMR4350 or H4350 has shot well with 100-grain bullets in every one, whether it has an 8, 9, or 10 twist. Generally around 41 grains does the job.

Me too, works in every 243 and 244 I've ever had so I've never gone further with load development with other powders.

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I went to the range this afternoon. 4451 has the 90 grain Accubond cooking with gas too.

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RL26 produces very good velocity and accuracy in three 243's and a 243 AI with 100g NPt's. I tried IMR7977 and results were mediocre, but have been tempted to try again.

Because I have a ton of H4831, I have stubbornly messed with 90 and 95g NBT's, and my pickiest 243 found a H4831 and 95g NBT load and is shooting the smallest groups it ever has. But H4831 pretty consistently runs 100-150 fps slower than what Hodgdon or Nosler claims with their load data. More powder just produces loose pockets and/or ejector marks........


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My 243 shoots 95 bt cloverleaf @ 3150 FPS with 45 gr of surplus 4831. Nothing sexy but it kills chit dead. I don’t need any modern powder till the old stuff is gone. Bought it at 65 cents a pound. Got enough to outlast me. I’ll let you kids have the new stuff. HaHa MAGA

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Back in my .243 days, I used a lot of H4831 and also Norma MRP, when I could find it, with 100 grain Hornady bullets.


Not a real member - just an ordinary guy who appreciates being able to hang around and say something once in awhile.

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With heavier bullets in the 243, I always used a 4350 variant, but use RL26 these days. Get a bit over 3000fps with 105gr stuff in a 21.5” barrel. 100’s should work there too.


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My .243 is very happy with RL16 with 95 gr ballistic tips. Same accuracy as 4350's, but almost 100 fps more.

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Like most on here I have shot a lot of 243 and 6mm rounds. Favorite powders were H4350, IMR4350, H4831, and H414. All have worked quite well with bullet weights from 75gr. up to 100gr. But now RL26 is the mac daddy when shooting 95gr. to 100gr. bullets. 4 rifles in 243 shooting Hornady Interlock 100gr. sp in front of 47.3 of RL26 attest to this. Velocity runs in the 3100 range with 22" barrels and accuracy is outstanding.

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Still have a couple of pounds of I4350 I need to use up. IIRC, the data sheet from my .22 Hornet Lee Loader has a load or two listed 😛


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RL-22 hits all the markers for a good load.

41.90 gns of RL 22 is good for 0.37 moa (5 shot) and 0.59 moa (10) shots at 500m/540 yards. Scope set at 10X for sporte/hunter class. Bullet 105gn Berger Hybrid.

Runs 3071 ft/s from a 26" bbl.

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For many years, I shot a hot load of IMR 4350, then tried R#26 and added 150 fps where it was the most accurate, right at 3200 fps 24" Rem 700 sporter.

Don't over look the 100g Hornady flat base and btsp.

Last edited by keith; 09/30/21.
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