Re: 223 Remington vs 5.56x45mm reloading help
This comes up often enough to become a sticky. How about it JLA?
I first ran into this "problem" a bunch of years ago, when I was shooting 5.56 surplus in my .223 Handi Rifle. I got pierced primers with 5.56 ammo (mebbe 4-5 out of 20), but not so with factory .223, 50 grain SP. I believe it was 55 grain FMJ, which is on the edge for stability with a 1-12" barrel...
My Anchor is holding fast.