No problem shooting Sierra .311 150gr out of both an SKS and a 527 CZ . 21gr of IMR 4198 seated same OAL as 123gr.A moose/ black bear load.Not enough difference in a .310 bullet and a .311 to matter what so ever. Seen a story of a guy using .308 Patitions handloads on zebra out of a .303 British and he got VG accuracy from what I read.Harold
That's pretty impressive velocities for given bullet weights in that ruger #1. Maybe it's time to get one in a cz bolt gun. Kinda hard to justify a #1 for 1800$.