SteelBanger
Well-Known Member
Grabbed some 55gr Hornady SP and started loading up a ladder this afternoon and when seating to the normal 2.25 COAL for AR mags it leaves the cannelure about .06 (if I remember right) above the case neck. I feel like I've read that's no big deal but thought I'd double check here. No big deal or is there a legitimate reason to go ahead and push them down to the middle of the cannelure?