Quote Originally Posted by FTGV View Post
Today I tried a small batch of .223 reloads with CCI BR4 primers.Of the five I had four FtF's. An identical batch except loaded with Federal GM205M primers, all fired normally. I can only assume the CCI cups are harder? Is this a firing pin spring issue?
check your stock fitment. Bolt handle allowed to travel all the way down, & bolt release tab not dragging on stock.