375 H&H A I

[Fotis]

I just had a 375 H&H Ackley Improved built recently. It wears a 24" Krieger barrel. I have fireformed a few brass and I am currently working on the AI loads.

I have 270 Hornady SP 260 Accubonds and 250 Barnes TTSX.

I have access to about every powder out there. Any suggestions for a load?

Thanks in advance and Happy New Year.

 

[JimP]

For a AI round I would just start at the parents case, in thing case it would be the 375HH and then work my way up as you should with any new loads.

I load for a few wildcat rounds where there is no actual load information published. I just start low and work my way up to where I want to be with a safe load.

 

[Fotis]

Yes sir. I have done this in the past with my 223 AI, 22-250 AI, and my 25-06 AI. I was just wondering what people with similar setups have come up with. Perhaps I did not make that clear in my post. My bad.

 

[JimP]

No it was clear, but with the AI only perhaps giving you a extra 200 fps it would be best to work up a load.

If you want you can look at the 375 Weatherby load data since it is very close to the 375 HH AI.

 

[Fotis]

True. The 375 WBY is quite similar!
Heck, if I get 2800 fps or so with the 260 AB and good accuracy I would be happy.
Thank you.

 

[uplander01]

I have a IMR 4320 load (basically I think you could substitute VARGET) that pushes a 270 TSX 2830fps out of a 23 inch barrel 375 HH. I like 4320 but it is a thing of the past, I bought 15 lbs of it some years ago and can't seem to use it up. Check the Barnes data, should lead you down a good path

 

[analog_peninsula]

As I recall, RL17 is the velocity king, but you have to deal with temperature sensitivity and it seems to largely be unobtanium these days.

 

[450 Dakota]

H4350 with 300 gr bullets works well.

 

[Azklmsr]

I really want to convert my 375 HH to 375 Weatherby. Push the 300 up to 2700 or a 350 around 2550 or better. Lil throttle push over the master. Should be good