I shoot the 230 Berger Match HT bullet out of my 300 win mag at 2788 fps, using 75 grs of Viht N570 powder. I have a 1:8 twist. Yesterday I shot at 1755 yards, and the bullets dropped at the rock I was aiming for, with no problems. My coal is 3.740 inches. I have a Tikka T3 Super Varmint, and the mag can not handle the long cartridge
I singele feed all my rifles even when hunting, as I try not to stress, and allways ensure that my first shot is good. So far so good
I am going hunting in Scotland in may, using this rifle and bullet, I will let you know how it performs when I return.