IMR 4350 or H 4350 for a swift A frame out of a 375 H&H

[C.W. Richter]

This just goes to show how every rifle is not the same in what it likes.
My Winchester model 70 375 H&H loves RL15 and will cloverleaf 3 shots at 100 yards as evidenced by the photo below. I have never shot anything else out of it because this load shot so well for me. The second photo is off sticks at 50 yards.
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Yes, come to think of it, the 2 375s I handloaded for were a Steyr and a Montana (semi-custom M70 style) and they too liked the RL15. I never experimented with (the tried and true IMR 4350 in) 375 as the Vs were lower and the 15 results were spectacular. Based upon what people are saying re: any 4350s I'm certain Varget would work well, too. (It's my 416s favorite).