Re: .375 Barrels for big magnums
Here are just a few:
Lawton- any twist you want
Pac Nor- 3 groove 1:12x and 1:15
5 groove 1:8x and 1:12x
6 groove 1:10x and 1: 14x
Depending on what bullet you plan to shoot in the 375, barrel twist can be quite critical.