I am trying to develope a load with the new Barnes Triple Shock 270 Gr bullet. I tried 76 gr of RL15 & got 2657 FPS out of my Mod70. The group was 1.5".
Has anyone gotten any good results from other powders?

Thanks,
Ahmed

Try H-4350. I get exceptional accuracy and velocity out of both of my 375s with this powder. It also has the advantage of being very tolerant to temperature changes.

465H&H

Ahmed,

The load you described will kill anything on the African continent with maybe the exception of elephant. I do think you could get a little more velocity. Try bumping your load one grain at a time and see what your results are. Each rifle is a character unto itself and what is max in one rifle may be quite mild in another.

Regards,

Mark

Mark,

The load seemed hot in my rifle, the bolt was sticking a bit on some rounds. I was using twice fired brass. I will try it with new brass & see how it does & then try upping the grains.

Ahmed

Watch it Ahmed, with 76 grs you are right at the top of what the books recommend for RL 15 with a 270 grs bullet in .375 H&H. Many reloading manuals specify the max at 73-74 grs, so it is not like you are way down on the scale.

Reload (a couple of) the cases you have shooting a couple of times, and see if your primer pockets stay tight. If not, you know you were above max, and reduce accordingly.

If you are already starting to get sticky extraction, it is very unlikely new brass will help you any. It is very controversial whether new brass will give you more or less pressure. What is almost 100% certain, is that fireformed brass will have larger internal volume than new brass. But I doubt new brass will help you.

You should really not load with the expectation to achieve the velocity your neighbour's cousin in Nebraska is rumoured to have achieved, or what you might have read in a book or Shooting Times. Load for your rifle, watch for pressure signs in your rifle, and accept the velocities you can safely obtain in your rifle. 100 fps more or less means nothing in the hunting fields. And what is more, you have to make sure your load won't produce high pressure when the temperature rises (in Africa), because then you might have a real problem on your hands.

- mike

Mike,

Thanks for the advise, the loads were hot & I don't want to take any risks.

Ahmed

The velocity sounds really low, as the load sounds really hot. I load 72 grains with a 270 North Fork and it goes 2770 fps with a crimped load, the Hornady goes the same velocity with 74 grains of RL15. I went to 73.5 grains when working up a load, went 2850 fps, but too hot, the 72 grain load works for me.

Ahmed
I used the 270 gr TSX on a plains game hunt the first of this month. It shoot very well sub moa.
It was great to 200 yrds,but pass 250 or so it dropped like a ton of bricks, the charts say a 8 " drop from 200 to 300 It was more like 13"or so. I tried 3 powders rl15, h4350,h4895.
the loads ran from 2500 to 2700 FPS and all gave about the same drop.I never could figure it out. My .416 350 gr TSX at 2600 fps shot a lot flatter. Check you results on paper. I had low hits on two animals at 250-275 yrds. even thought I held about 8-10" high. I think I will start work with the 300 ,375 TSX It has a better BC. When hunting you won't notice the differance in recoil.

JD

Ahmed

As others have suggested if you are already getting bolt lift at 76gr. quit there and regroup. You should be able to find something that will give 2700-2800 fps with a 270 gr. bullet. I get a solid 2800fps with 2 different 270 gr. bullets and IMR 4350.

Actually if you are thinking buffalo in your plans you probably should lean toward the 300 gr. bullet. A premium 300 gr. bullet at 2500-2600fps will handle everything you've talked about with ease.

Regards,

Mark

Regards,

Ahmed:

Last year when I was looking to develop a load with in my 375 H&H and the 270 grain TSX (My rifle is a CZ550), I was going to try RL15 but it was out of stock at the local shop.

I was also reloading for a 458 Lott using H4895 which was a listed powder in the Barnes manual for standard "X" bullets in 375 H&H. I ended up loading 69 grains of H4895, 270 grain TSX, Federal 215 match grade primers, Norma 375 Brass Brass...at 90 degrees F this load chronographed a nominal 2720fps and was extremely accurate. I used this load to take a Zebra at 220 yds, one shot and great penetration and one shot on a Heartebeast.

I will be using this load when I head back to Tanzania in two weeks for plains game and back-up Buff Gun.

Good luck and obviously work up to this load by starting lower, if you decide to try it out...data is available with this powder in the Barnes reloading manual...

I tried the recommended load of RL 15, 72 Gr and 300 gr Sierra softs and 300 gr Hornady solids. Velocity rom my 22 1/2 barrel was just under 2900 fps. Scared the hell out of me. Those are 378 Weatherby velocitys. Interestingly no signs of excess pressure. Go figure!

465H&H

I use a max load of IMR-4064, the standard for accuracy in the 375 for the last century or two...and it worked for me...

I tried to work up a load for my 375 and used R-15 and a 260Gr Accubond for deer. I tried working ther powder up a grain at a time and found that the max powder gave me a group of 1.7 inch at 100 yards but when I backed off about a grain of powder my group dropped to .96 of an inch. I have no chronograph but I would rather have the accuracy than a little more speed. try backing off a little on the powder for accuracy.

Riodot