I did more lightweight bullet testing in my 375 H&H with the Australian Copper Projectiles 200 grain Sidewinder and the CEB 235 grain Raptor ES bullets. I was using published loads from about half a dozen sources for the higher performing powders that I have on hand. None of these loads are max and it seems like the ACP bullets were shooting better with higher velocity loads so next time I’m going to start at higher charge levels to see if the groups tighten up more.

All of these loads were shot from my Winchester Model 70 using a Leupold VX-3 2.5-8X scope at 100 yards off of a front rest and sandbags.

I'm thinking of trying one of my high power match scopes to get a finer hold at distance.

Looks like one shooter of a load with the 235 CEB and 76gr RL15 in that last photo!

Yes, I think that the gun likes that combination.

I've tried that load three times and the biggest group it shot was 0.6" at 100 yards and 1.2" at 200 yards.