Re: 264 Win Mag Sendero
The group was from 120 grain Nosler Ballistic Tips, 71 grains Retumbo, Nosler brass, Federal 215 primer. I only tested this powder and bullet; varied powder weight.
Factory barrel that was re crowned when Kevin put the brake on.
Kevin also built me a matching twin in 7mm STW. I haven't put a scope on that rifle yet.