If you can't shoot your stuff well inside 3/4 MOA all the way to 1000 yards, even dreaming about spin drift is a total waste of time. There's a similar change in bullet impact with a 10 mph head or tail wind; do you correct for that 15 fps change in the bullet muzzle velocity relative to the air it goes through?
US Navy Distinguished Marksman Badge 153
Former US Navy & Palma Rifle Team Member
NRA High Power Master & Long Range High Master
NRA Smallbore Prone Master
Last edited by Bart B.; July 19, 2013 at 05:47 AM.