Simple, you measure bullet impacts center to center, if the outside diameter is .346" and the bullets diamiter is .264" that means the bullet tips impacted within .082" of each other which is just under 1/12th of an inch. You cannot measure accuracy by outside diameter alone or super small calibers are more accurate by default, center to center measurement is just more accurate. Think about it is it impossible for a 50 cal to shoot any tighter then 1/2 MOA even if it is shooting a one smooth hole group? To call that 1/2 MOA is not a fair representation of it's accuracy.Kachok: Nice shooting. I don't know what "outside diameter" means, relative to group size, but if it's center-to-center of the most distant shots, then that's some good shooting. I do know that .3+ isn't 1/12 m.o.a., if I'm reading you right. It's more like 1/3 m.o.a.
What range was that MachIVshooter? 1.9" from standing is hella good shooting.Mine was last Sunday and I don't feel like snapping and uploading a picture, but I was pretty happy with 10 shots into 1.9" in under 90 seconds from a standing position with front rest using a 16" AR-10A2 and 150 gr. Hornadys in military brass of all different headstamps.
What range was that MachIVshooter? 1.9" from standing is hella good shooting.
Simple, you measure bullet impacts center to center, if the outside diameter is .346" and the bullets diamiter is .264" that means the bullet tips impacted within .082" of each other which is just under 1/12th of an inch. You cannot measure accuracy by outside diameter alone or super small calibers are more accurate by default, center to center measurement is just more accurate. Think about it is it impossible for a 50 cal to shoot any tighter then 1/2 MOA even if it is shooting a one smooth hole group? To call that 1/2 MOA is not a fair representation of it's accuracy.
+1You measure center to center..Center to center of a .50 caliber is zero.Same as a .22,center to center is zero.Provided it is a perfectly smooth hole in one....LOL.