I’ve been reloading for close to 40 yrs. and loading for numerous 223’s over the years. But none were semi-autos or AR’s. Weelll, I just got an AR. I understand that the basics are the same, but my question concerns crimping. I’ve talked to a couple of folks who reload for AR’s......one says he never crimps but maintains a tight bullet to neck fit. The other uses bullets that allow him to roll crimp into the cannelure. I thought maybe some of you guys might have some insite as to how I should approach crimping. Roll crimp, taper crimp, or no crimp? I also bought a few PMags which all seem to measure 2.25 inside max so how short is my max OAL to feed well in plastic magazines? Thanks in advance for you help.
I set my seater to put a slight crimp on the bullet. That also helps with reducing TIR. Something a lot of guys don't understand. A Pmag is generally 2.260" on the inside. So most of us run our OAL to somewhere around 2.250-2.255" to allow for reliable feeding and loading of the mags.
