Thread: Reloading .223/5.56 for an AR15

Full Length Size each time for a nice smooth feed.
Crimp, only because someone told me too. May not be necessary if bullet seating nice and tight. Its probably more for if you don't end up firing for whatever the reason(say just shot something) and need to clear chamber to make safe, last thing you want is bullet stuck in barrel.
Don't bother chamfering, can if you wish. Trim to close enough.

Hunting load 65gr Seirra GameKing's 24gr BM2 COAL 2.25" for a 1/7 twist 5.56 chamber 16" Barrel, somewhere around 2720 fps?

Super accurate load
Hornady 75gr HPBT 21gr BM2, very accurate like .3" groups, but slow 2400 fps. Load long to mag will allow
Would be worth a play around with these as did test groups up till 23grs book max and none over 1.5" but the low loads accuracy is just so flattering didn't know rifle was even capable of this.

Note: a 5.56 chamber is slightly longer than .223 or a .223 Wylde
As mentioned above a chamber case gauge, 55 gr bullets are no hassle but if you are trying to load longer and more accurate 65g+ (insert disclaimer:don't try this at home) in a safe direction you really need to try feed some from magazine and into battery as rifle action is designed to work. Working action slowly can be misleading and perfectly good ammo not feed.

Ar mags are of varying lengths on the inside with the metal ones being able to load out a bit longer normally. Someone should design a hybrid lower and some longer mags!
Hope some of this helps.