Quote Originally Posted by bigedp51 View Post
WV1951

I'm loading for three AR15 rifles and a Savage .223 and I do not crimp any of the cases. The majority of dies have a expander .001 smaller than bullet diameter and you can increase bullet grip by reducing the expander diameter. Whidden custom dies sells expander kits with five expanders from bullet diameter to .004 under bullet diameter.

The expander for my AR15 rifles is .002 smaller than bullet diameter using Lake City brass "without" crimping.

And all my primers I use for my .223/5.56 have a cup thickness of .025.

You have two problems, your crimping your cases and using a thin soft primer. Stop crimping and change primers and your problem will go away.
I don't crimp any of my loads, for ar or bolt rifles. None of my rigs have any recoil since they're all outfitted with brakes or cans.


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