Load for 375 H&H Magnum with Sierra Kings 250 grain Bullet.

Bravo4 · Apr 2, 2014

Helping a Friend reload for his 375 H&H Magnum with Sierra King 250 grain bullets. Only powder available is Reloader 15, so I came up with 76 grains with online manuals.
Anyone in the forum thinks this would be too hot of a load?
I don't have A Sierra Bullets Reloading Manual to double check.

badnova · Apr 5, 2014

I like IMR-4320 with 270 gr. spire points, Elk medicine
250 gr. is pretty light for a 375
Look at the online manuals
I believe Sierra is online

Bravo4 · Apr 5, 2014

Thanks Badnova. Got some good data from handloads.com, I think 76 grains of RL15 will be good to try. Yeah, 250 grain bullets are light but is what this guy has available.

AMProducts · Apr 6, 2014

mmmmm biiiiig boooomm....

Yea, I think you're on the right track.

Whitey375 · Apr 13, 2014

I had a load with my 375 that was 76grs of RL15 with the old (non-TSX) 250gr Barnes. Did about 3/4" groups at 100. Then switched to the 260gr Accubonds with the same load, I think. Either way, both bullets did 2860fps average and shot well.

Bravo4 · Apr 13, 2014

Whitey375 said:
I had a load with my 375 that was 76grs of RL15 with the old (non-TSX) 250gr Barnes. Did about 3/4" groups at 100. Then switched to the 260gr Accubonds with the same load, I think. Either way, both bullets did 2860fps average and shot well.

Thanks Whitey. This confirms my data and calculations.