.375 H&H... Your favorite loads

T

Theron

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So I recently added a .375 H&H to my ever growing collection of firearms. Being the biggest and baddest of what I have so far, and because factory ammo starts at $60 a box, I want to start reloading my own ammo.

What are some of your favourite powders/bullet weights? I realize this is a vague question.. But right now I am still deciding what I want to actually do with the gun other than blow stuff up. :D

It also seems very difficult to find brass and bullets for this thing. Is there any good place online that sources these?

Thanks a lot,

-Josh
 
WSS seems to have a lot of Remington brass.

As for loads; I've shoot more animals with H414/W760 and various 270 and 300 grain bullets than any other. Its not the fastest, but always seems to shoot in different rifles. Having said that, my current and unlikely to ever change load is 73 grains of RL15 and a 270 grain Swift A-frame. (work up) The A-Frame hammers things, and the RL15 produces a little more speed than most. May as well take it if you can get it.

Something that I've noticed over and over again is that the .375 inevitably shoots better with standard primers than magnums. I have no idea why but its hard to argue with targets.
 
Thanks for all the replies. I'm starting to like the idea of a 270 grain bullet, with the same trajectory as a 30-06 but double the knock down power. Seems like RL 15 is the thing to do? How is this powder going to work in other calibers.. say 300 WSM or 30-06?

-Josh
 
270gr Winchester Power Point, 73 gr Winchester 760, Fed primer (2648 fps)
300 gr Winchester Silver Tip, 75.5 gr Winchester 760, Fed primer (2515 fps)
 
Winchester factory load is 73 grains of what ever powder they used with the 270gr bullet. You and I both know that they use their own WW760 powder. I have taken factory loads apart and weighed the powder. My hand load is identical to the factory load and puts them literally in the same hole. This is not a hot load by any means. If I wanted a barrel burner .375, then I would have got the Weatherby. It does not matter about the speed of the load it is how well you know the load and can shoot the rifle. With this load I can shoot a 6" group at 600 yards off the hood of a truck. This is using only a 4X scope and no other range/wind tool of any kind. Not awesome shooting but considering the caliber and lack of a muzzle brake, pretty darn good.
 
Hornady manual volume #4 calls for 81.7g of WW760 for 2650fps.
I know its pretty hard to overload the 375 with 760 (cant get enough in there). Its been a while since I had to load for mine but i seem to recall i couldn't seat the bullet on this charge and still have the OAL right.
 
Dogleg said:
Actually, I have no reason to believe they use any canister grade powder. Why would they?
Click to expand...

I know of one Winchester supreme load that they surely do use canister grade powder and I am sure there are others. I have copied it(all components) and chronographed it beside the factory load to prove it. If the powder in the load I speak of is not canister grade then I have made a load that exactly duplicates the factory load.

Only reason why I did so was because the load was so extremely accurate in a certain rifle I just had to try and duplicate it. And no, this was not a 375 load...

Sorry, carry on :redface:
 
I used 300gr TSX's with 69.0 gr H4895. If I had to do my load development over again I'd have gone with the 270gr TSX's or possibly even the 250gr TTSX's. There is less need of mass when using solid copper bullets as you don't shed any weight so the velocity increase is more worthwhile to the weight increase. Plus the 300gr bullets take up a huge volume of case capacity....
 
I was shooting 260grain accubonds yesterday with 72 grains of RL15 @ 2580fps. 73 grains got me too 2680fps. I thought they would be much quicker according to the books (at least they felt that way...). I was using Remington brass and Federal 215 primers. The chroni was set up about three feet away. The 72 grain load shot 5 under an inch (honestly) and the 73 grain load opened up to about 1.25". I was developing a flinch by then though as I had to sight the rifle in initially. The gun is a new M70 Alaskan topped with a vari x ii 1-4 power.
 
Dogleg said:
WSS seems to have a lot of Remington brass.

As for loads; I've shoot more animals with H414/W760 and various 270 and 300 grain bullets than any other. Its not the fastest, but always seems to shoot in different rifles. Having said that, my current and unlikely to ever change load is 73 grains of RL15 and a 270 grain Swift A-frame. (work up) The A-Frame hammers things, and the RL15 produces a little more speed than most. May as well take it if you can get it.

Something that I've noticed over and over again is that the .375 inevitably shoots better with standard primers than magnums. I have no idea why but its hard to argue with targets.
Click to expand...

What kind of speed are you getting with 73 grains of RL15 under the 270 grain speers with what primers?
 
78grs IMR4350 and 270gr Hornady SP. Gave me 2692 fps from a 24" barrel Whitworth.

375Whitworth_zps5bf59e1f.gif
 
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