Re: 375-338 Lapua Improved
That's asking a lot, to push a bullet that is 50 grains heavier at the same velocity. I would say 2800 or something in that neighborhood, maybe a little better is more realistic. You are going to push the .338 bullets faster in that configuration, and if you are going to run the same weight bullets as the .338, you are going to sacrifice Ballistic Coefficent. I think the only way you are going to beat the .338 Lapua (improved or not) with a .375 bullet is to go with the .375-408 or another higher velocity .375 cartridge. If you want to stay with the Lapua bolt face and action, stay with the .338 caliber, that is my opinion. No reason to pay more for bullets and get less performance