Home Forums Hunting & Shooting Express Rifles and Big Bores Only Pet loads for 375 H&H??

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