"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." [/quote]
What is TIR? Also, is it required that you use "small base" dies for AR reloads?
Thanks
Last edited by Kota; 06/10/20.
