Re: 375 HH and 300 barnes
I shot two whitetails with it last year out of my 375 H&H. I used 71.5gr of R-15. Just work your way up and you will be fine. They seem to shoot well they just copper foul really bad in my rifle so I am taking a look at the fail safe. I was getting 2554fps with the 300 TSX and that is out of a stock Rem 700 with a 24inch barrel.
Fast, Flat, and Accurate