My six five two eighty-four is a .296" neck and reamed for Norma brass. It is throated for the 140 Berger Vld seated so the base of the bullet is at the top of the shoulder.
I too was worried about how well it would kill rockchucks/woodchucks at long range as I have seen 80 grain .224" Bergers just poke holes in varmints, but after shooting many chucks with the 140 Bergers now, I think it is a big enough bullet that it just whops 'em good! This chuck at 1508 yards lifted up about 12 inches in the air, and exploded in the chuck in fine fashion!
I have derived a theory that a hollow point match bullet of above 110 grains has enough energy and momentum that it will blow up chucks almost like polymer tipped bullets.
My barrel is a 5 groove Pac-nor with an 8" twist and it is 30 1/2" long. My rifle liked every powder I tried, but I got the best velocity and SD with 50.5 grains of RL22. RL25 and N165 deserve honorable mentions as well.
There aren't many things about guns that are written in stone, but seating depth of VLD's is one of them. I have yet to see a gun shoot VLD's well that weren't jammed into the riflings somewhat. Mine are into the lands about .006".
good shooting, and have fun with one of the best calibers ever invented! [img]/ubbthreads/images/graemlins/grin.gif[/img]