I have loaded alot of 357 Mag rounds for my S&W 686 w/ 6" barrel, and often encounter flat primers. Almost all full factory loads give me flatten primers. I have learned not to pay too much attention to them as long as the cases don't get snug and the primers do not crater (around the firing...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.