Looking for favorite loads for your 375 H&H ... 260 accubonds are my favorite. Anyone running RL17 or RL26?? Thanks in advance

Yep, RL-17 under 300gr Partitions and BBW #13 solids, partitions run 2680, solids go 2700 fps.

WW or RP brass,
start at 76gr RL-17 with a chronograph.
Fed-215 or CCI-250 primers.

Accurate as hell in the old pre-64 375 H&H I bought from BSA, hell of a rifle and loads.

I'm using 375 H&H, RWS brass with 74.0 gr of Reloder 17, Fed 215 GM primers behind 299 gr Shock Hammers in My Weatherby Safari Classic, 24 inch barrel, mv 2670 fps. Hottest I could use was 76.0 gr getting ejected marks. JM

When I retired my Model 70 almost 30 years ago, it shot extremely well with, R-P brass, CCI primer, 82.0 grains of WW 760, with a Hornady 270 grain SP. When I did my part, it was good for 5 rounds inside of 3/4” ....one big ragged hole in the target! memtb

It depends on what you're hunting.

Cutting Edge Bullets makes some unique products. I've had great results with their 135 gr. Raptor in my .308.

In my M-70 NH .375 H&H, this load worked out really well. I haven't bloodied it yet, did with the .308.

I've heard some African PH's like CEB bullets. I don't think they do well in brush, but for PG and general hunting, pretty impressive accuracy and terminal performance..

They're expensive, but how many do we actually shoot at critters. Practice with something less expensive.

Here are a couple of links. I wrote the second review on this .308 bullet. https://cuttingedgebullets.com/308-135gr-er-extended-range-raptor

Here's the .375 bullet I used. https://cuttingedgebullets.com/375-235gr-er-extended-range-raptor

Well, that kinda group may be hard to duplicate, but it happened once. And, you'd know it would be the one the chrono missed. CEB bullets are accurate and deadly and expensive....

DF

Thats damn good. I loaded the 260gr partitions in my pre 64 375H&H. Loved those pills... Ha ha.. I see gunner commented on that very rifle. That one sure is a sweetheart of a rifle. Excellent shooter with many different weights of bullets..

I have used R-15 almost exclusively for 235-300 grain bullets. Next time I load for the 375 it will be with R-16 and Hammer 250s. The Accubond is a good choice, I carried it a couple of times for Elk but never connected. They are devastating on deer and hogs.

Have not seen any R-26 data for the 375 not sure if it is in the ideal window as it may be too slow or bulky for the H&H, might have to find out.

I've been happily using Mule Deer & Nosler's accuracy load:

69 grains of RL-15 and the 260 grain Nosler Accubond for about 2650 fps.

Good accuracy and it's a great black bear load. I haven't shot anything else with it, just a few bears from 15 feet to 300+ yards.

Regards, Guy

I used the above load with a 260 gr Partition a number of years on two bull elk. It worked and was extremely accurate in my early M700 Mountain KS. I put together a load using the 270 gr TSX five or six years ago on an unsuccessful brown bear hunt in SE Alaska. It used 73 grs of RL-15 and was very accurate. I never chronographed it. It's all I will use in the future.

A little late to the thread, but I was happy to see a vote for 760.

I'm new to the 375, but ended up with 2. Initial reloading efforts were with the 300 Sierra, since that was all I could find at the time. Based on Ken Water's recommendations, tried 760 as part of my initial testing, and got better results than with RL15, Big Game, or 4350. 77.5 - 760 at about 2600 dropped immediately into 1" groups with the RSM, and the M700 liked it just as well. POI is right with factory ammo as well - good stuff! Looking forward to trying the 270s next.

PS - it may be awhile before I can try RL 16 or 17, as powder and primers are now unobtainium!

KLD

Not sure which CEBs you’ve found don’t do well in brush.

I’m sold on the CEB BBW#13 570 grain 0.510” Solids, having used them on 2 elephants so far. On the 1st of these. 2 of the insurance shots went through 2 different mopane trees, about 2” in diameter, before hitting the downed bull in the chest. Neither tumbled. The BBWs penetrate in a straight line through obstacles like thick hide. bone and feet of muscle, better than any bullet I’ve used. The 400 grain Barnes 0.423” Solid is as accurate and probably penetrates as well as the CEB but I haven’t had as much experience with it.

This fall i did some .375 H&H handloads for my CZ for early rifle season deer, elk and the possibility of black bear - i'm strictly a "do it yourself hunt hunter." (Latter part of the season the grizzlies, which have doubled in population in my neighborhood in the past decade according to science, have mostly denned up and i carry a lighter rifle. Though to be honest, by then i'm used to the weight of packing the CZ around and don't much notice it. I only notice that my 99 Savage feels like a stick of balsa wood when i first pick it up.)

For this season i loaded up some 250 grain Hornady GMX bullets over 64.5 grains of Varget. The GMX's were all the local shop was carrying in this bullet weight but i liked the idea of the non-lead bullets since having been educated on the subject anyway. The powder load is right in the middle of recommended. This is where i tend to load, my research suggests that unless you are pushing for maximum range (i'm not, i hunt with open sights) pushing the envelope on powder charges/velocities has the tendency to increase extreme spread/decrease consistency of accuracy, increase recoil, increase wear and tear on firearms over time and decrease case-life. This combined with my experience that increased velocity often enough comes with increased havoc on the carcass means that as a hunter i'm going for mid-range powder charges in all my handloads.

In this case the result was a joy to shoot sighting in on the back 50. The CZ didn't lose any of its marvelous accuracy and I don't recall detecting ANY felt recoil with this load. Which is quite something in rifle where the recoil of 270 grain factory loads (which i've read are often fairly hot in this calibre) is authoritative. Alas, i didn't shoot anything early season so i don't know yet how they perform on game. I am sure they will knock down an elk just fine, hopefully the damage will be minimal as is usual with heavier bullets. I am pretty confident they will still stop a grizzly charge. One thing i did note however is that not all test shots penetrated the 3/8 inch steel backing plate, a minority of them leaving a nice shiny copper-plated crater instead. This never happens with lead. Does this matter? Maybe we'll find out next year. I may pass on any 3/8 inch steel plated game.

I will say that this load should please anyone averse to recoil.

Raptors, those designed to frag, reportedly can start that process too soon if they hit something before contacting a critter.

gunner500 likes the CEB, BBW's, so they gotta be good.

DF

I used mostly 270 and 300 grain bullets for the largest part of my shooting with my 375H&H and I have fired it so much in the last 44 years I had to re-barrel it because I shot out the throat on barrel #1.
The powder I found to give me the very best results overall was IMR4064.
The 10 grain lighter weight of your bullet would probably not make a lot of difference. Might try 4064 and see.

My loads for a M70 24" barrel, full length bedded, 3lb trigger. All these loads shoot 5 shot groups 1" or better @ 100 yards:

Speer 200 gr. JFN - LR Primer, 67 gr. H4895, tickles 2,800 fps MV

Speer 235 gr Hot Cor SP - LR Primer, 73 gr. H4895, tickles 2,800 fps MV

NAB 260 gr, - LR Primer, 69 gr. RL15, tickles 2,650 fps MV

Hornady 270 gr. SP - LR Primer, 75 gr. RL15, ~2,750 fps MV, 0.030" off the rifling, probably my most accurate load

Swift 270 gr. A-Frame - LR Primer, 74 gr. RL15, ~ 2,700 fps MV, 0.030" off the rifling

Hornady 300 gr. RN - LR Magnum Primer, 77 gr. H4350, Compressed load, ~2,550 fps MV, ~1" groups. Switch to LR Primer, ~3/4" groups.

Woodleigh 350 gr. PP - LR Magnum Primer, 68.5 gr. H4350, ~2,250 fps MV. Load data supplied by Woodleigh.

That’s great info. I would love to build loads from 200 to 350 for the 375 I have on order. Would be a great way to learn a rifle that could go from coyotes to Cape buffalo...

Yup, not a surprise. IMR 4064 has worked very well in many cartridges. I read that, at one time, the .375 H&H was factory loaded with IMR 4064 powder.

RL-15 has become such a popular .375 H&H powder, one wonders about similar burn rate powders if and when RL-15 becomes hard to find (like now).

In addition to 4064, Pw Pro 2000 and CFE-223 are close, as is Leverevolution and the now discontinued 4320. Also Vv n-135 and Norma 203B. So, in this day and age, you shoot what you can find. Seems about anything in that burn rate range may work. The old .375 H&H is pretty versatile.

DF

For African hunting loads I am using :

300 Grain TSX, 69.0 grains RL15, CCI 250, Hornady Brass

300 Grain Hornady DG Solid, 69.5 grains RL15, CCI 250, Hornady Brass

I get just under 2500 FPS out of a 24 inch barrel. These loads shoot to the same point of impact.

I use RL 15 with the 270 TSX and 300 gr Barnes Banded Solids

[quote=Puddle]My loads for a M70 24" barrel, full length bedded, 3lb trigger. All these loads shoot 5 shot groups 1" or better @ 100 yards:

Speer 200 gr. JFN - LR Primer, 67 gr. H4895, tickles 2,800 fps MV

Speer 235 gr Hot Cor SP - LR Primer, 73 gr. H4895, tickles 2,800 fps MV

NAB 260 gr, - LR Primer, 69 gr. RL15, tickles 2,650 fps MV

Hornady 270 gr. SP - LR Primer, 75 gr. RL15, ~2,750 fps MV, 0.030" off the rifling, probably my most accurate load

Swift 270 gr. A-Frame - LR Primer, 74 gr. RL15, ~ 2,700 fps MV, 0.030" off the rifling

Hornady 300 gr. RN - LR Magnum Primer, 77 gr. H4350, Compressed load, ~2,550 fps MV, ~1" groups. Switch to LR Primer, ~3/4" groups.

Woodleigh 350 gr. PP - LR Magnum Primer, 68.5 gr. H4350, ~2,250 fps MV. Load data supplied by Woodleigh.




Thanks for posting that. I’m in the process of loading up some 235 TSX for elk. I really want tp get them as close to 3K as possible.

You betcha. Just recently restocked my stash of 235 grainers.

Been limiting the use of my 200 gr. PD load as I can't find the Speer's anywhere and the Sierra equivalent is $1+/boolit ...

Bump to the top! Just recently picked up my first 375H&H. A nice lefty Sako AV Deluxe and got all my reloading supplies. Found 4 boxes of 270tsx at my local shop(very surprised), 2 boxes of 260 accubonds, 2 boxes of 260 ballistic tips, 3 boxes of Speer 285 grand slams and 1 box of 300 Aframes. Got RL15, 16, and 17, Varget and H4350 so looking to develop a few loads. The 270TSX for my first African trip next year and plan on taking it this fall to Texas to get her bloodied up on an axis and some whitetails at home. Probably use the 260 ballistic tips on axis and whitetails.


Roy

Back when I had a 375HH, I used a 235gr TSX over 78.5gr of RL15 and a CCI LRM primer. MV was just a hair over 2900.

260 AB RL17 79 grains = 2820 and under moa
300 AF RL17 75 grains =2620 and one ragged hole
Used fed 215m and Norma brass.
Got a old stock 300 grain Hornady RN shooting under moa with RL15 68 grains.
Guns a pre64 win.

Another vote (but not many shown in the thread) for Varget. 63-64 grains, Fed 215 Mag, and 270 XLC, TSX, along with 300 TSX and Banded Solids have all done very well in the Dakota 76.
There are faster loads but this one is nice to shoot and none of the critters could tell it wasn’t a max load...

CFE223 using latest Speer data for 270 grain bullets. Increased charge until I got 2725 then stopped. Not maximum in my rifle.

My own favorite is my “plinker” load. It is the 220 grain FN from Hornady over 74 grains of RL15....about 2800 fps.
Winchester M.70 Express.

tag

So far I’ve loaded up 270 interlocks and 285 Speer Grand Slams with 76gr of Win760. Heard 760 is a good powder and got a few pounds so fingers crossed. Will test em out shortly to see how they do. Plan on taking which ever one shoots better to Texas for axis. Gotta get the new gun bloody!


Roy

78 grains of reloaded 15 with a 250g ttsx is a good one.

My last .375 liked H414, fairly stiff loads, behind Hornady or Speer 270 grain bullets. I wanted it to like H4350 behind 260 grain accubonds but it did not cooperate.

I used W760 which is the same as H414

I started load work in my Ruger No. 1 with Varget and RE15 and had such good results I haven't tried anything else. 70 - 71 gr of either with 270's shoots about the same and accuracy is very repeatable. Final 100 yd site-in and I haven't shot it on paper since:

JGray - that's a mighty fine group!

Guy

Thanks Guy - I have several similar targets from that rifle. It amazes me how consistently it shoots this well...

Jerry

Not fine tuned to POI, but shows what the load and gun (NH .375 H&H) can do.

CEB Raptors are great bullets, although a bit expensive. They are designed to frag with the core boring on thru. Kinda like a mono Partition.

https://www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/11900268/CE_Raptor_.375_H&H

Link to more Raptor data.

DF

You're ready for all the plains game of Africa DF! good shooting.

Gun’s ready, for sure. Not so sure about me.

That bullet is pretty amazing. I’ve read some PH’s like these Raptors.

DF

LOL! you best get over there and lay some loin on the grill DF, what a great and unique place, not to derail the thread too much, but lighter monos, solid or these that shear are "bad through the bone" stuff, i dont know the dates, grades, expiry or anything else about both soft and hard body armor a bud brought out to the farm last year, plus, iirc a block of 1.5" laminated bullet resistant glass, well, guess what ate all three for supper?

Dinky 90gr Lehigh Defenders from my 357 Sig, velocity runs near 1700 fps over Longshot in the big P226 Sig, barrier blind and ready to go to work, old buddy kept shaking his head!

Yeah, they be some bad to the bone projectiles.

I got some 68 gr. Lehigh's loaded in my 9mm's...

DF

NICE! ^^^^^^^^^^^^^^^^^^^^^

Nosler M21 375 H&H Mag.loaded with the 260 gr E-Tip.
81.0 grs StaBall 6.5, R-P case and Federal GM215M primer is getting 2725 fps and .7 MOA.

Big game from ramshot is the ticket

What bullet and what's your load, please? I've started to use it with the 250gr TTSX for improved accuracy if possible. Have been using CFE 223 for 2850 fps.

Bob
www.bigbores.ca

80 grains of CFE223 behind the 270 grain TSX gets me 2806 FPS in an Interarms Whitworth MarkX

Close to max in the Barnes new load data with the 270 LRX

https://acrobat.adobe.com/id/urn:aaid:sc:VA6C2:ffd2b1a5-f292-4801-8052-35c7f1d4e968

https://www.barnesbullets.com/load-data/

Oops - already posted above...

I took a nice bull moose locally at about 200 yards with a Nosler AB 260 grain with 71 grains IMR4064, R-P brass Fed GMM primers. Very accurate in my Cz550.

The recovered AB weighed 161 graines, shot through the forward shoulder. And recovered in the off side.

A couple days ago I used 81.5g of H4350 topped with a 260g NAB out of my pre 64 Mod 70. It shot a tiny group with this test load and my ave. velocity is ~50 fs slower than Hodgeden gets.

What was your MV?

I've taken over a dozen African animals with this load:

It's not a max load and I haven't shot it over a chronograph. I'd expect 2600-2700 based on published load data...

God varmint load. Accuracy is incredible.