SSG Graybush
Well-Known Member
Well there's plenty of .284 8T blanks out there, get one spun up in 7 wby mag. No big whoop. I did a 26" 7 RM in 8T for the heavies, shooting a 180 vld-h at 2900-2925 fps depending on the temp. Shoots constantly at .4 ish moa.ah…I had overlooked that little detail. Didn't realize they were factory standard 10 twist. That does chang things.
For a 7mm, get a 8T to stabilize up to a 195 gr Berger or a 168 gr Barnes.
I developed a load for a buddy's 270 wby mag with a 130 gr ttsx's or tsx I cant remember and 7828ssc. Pretty easily got it to .75 moa in a week right before a WY trip. By using Seirra accuracy load charge weight and played with jump. I was surprised by the recoil. Or lack there of I should say. I like the newer short fat steep shouldered cases but the old belted mags got it done as well.