So I guess the factory 1-12" ain't gonna work, eh? <grin>
Might have to look for a new barrel with a bit quicker twist if I'm gonna get serious about runnin' that bullet through the gun...
The heaviest bullet I've been able to stabilize in a 1-12 .223 barrel is the Nosler 69gr HPBT Match. Not in the same league as the 75Amax though.