where did i go wrong, first time reloading the 223 using RCBS P/N 11103 S.B. die set.  Stag arms carbine, one fired brass, trim length 1.746, overall length 2.220, 55gr fmj. 25 gr winchester 748, different head stamp, Seat die set to top of case  +1/8 thurn. Neck dia. after seat .246. First round fired ok, next was a jam, after that several were no fires as if firing pin was not hittting.  Next were several fires, then 2 consecutive jams.  No problems with purchased ammo.

IBTL


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