Quote Originally Posted by bigedp51 View Post
Below CCI 400 primers fired in a AR15 rifle, the primer cups are too thin for this type over gassed rifle.

And the anvil has been pushed out the hole in the primer by chamber pressure.







Moral of story, know thy rifle and more about the correct primer to use in your rifle.
And if your SKS goes full auto you will need to use "Shout stain remover" on the brown stains in your underwear.
Bigedp51,
Good info. My past experience with the blown primer although many years ago did end up with a trip to K-mart to buy new underwear.
When I made the change from 6-1/2s to 400s thought I was good to go and shot the .221 with them ever since. Your info shows that I was misinformed at the time (before internet). Grandkids even shot it from time to time as a trainer rifle. Thank the Lord that no one was ever hurt (scarry). Haven't shot it for a while so I will pull apart whatever ammo I have and start over with the 450s.
Just purchased a new .223 take off barrel (not mounted yet) and need some 450s for that anyway.
Shows me that you are never too old learn (or at least open my eyes).
Thanks again for the heads up,
Randy