Haven't been shooting loading .45 for a while and since i was caught up on 9mm and .40, switched Mr. Dillon over to .45 and LPP. Ran up a batch and when i tested, then the trouble began. Using mixed range brass appx .895 (speer manual says .898 is OK) 6.9 gr Unique 200 gr Berry's Flat Point seat for OAL of 1.242 All rounds passed GO using a Lyman gauge Pistols were full size Colt Series 70 and a Rock Island compact They all "initially" chamber, but when firing after initial chamber and extraction, second round jams not allowing the gun to go back into battery. Upon extraction, previously jammed round goes into chamber fine, again, initially and same action upon second round. The Series 70 could not be fired. the RI Compact, most times just took a nudge to the rear of the slide and round would chamber and fire. I ten tried two different varieties of factory, S&B FMJ 230 gr and Speer 230 GDHP. Both fired and cyclerd without a hiccup. OAL for Speer 1.20 and S&B 1.265 and case length for both .895. Can't figue out what is wrong. OAL or crimp? Shouldn't be powder charge as 6.9 is right at the recommended charge for a 200gr. Maybe the bullet profile?