Problems occur when you try to fire weak loads fire forming in the once fired LC brass.
Work up a load using once fired lake city brass, standard Kiss, find pressure technique and don't be surprised when the load ends up being over max for 223 loads in your fire forming loads.
You should expect excellent accuracy fire forming, and use a thick cup primer in all your 223 AI loads or burn holes in your bolt face. CCI 450's, Tula Mag primers(get them while you can), 7 1/2's, and CCI BR-4's are your thick cup primers.
I use IMI, Lake City, Rem, and Win brass...223 AI does not care, shoots little bitty holes with all of them.
It does care if you seat the bullet to touch the lands or into the lands.
Stomp on the the gas!
