I have recently purchased a Para Ordinance 9MM 1911 and am having trouble with some of the loaded rounds not seating fully in the chamber causing the gun not to go into battery. All the measurements are within spec. I've tried light crimp and heavy crimp, the light crimp seems to work best. I'm loading on a Dillon 550, 5gr. Unique behind a 124 gr. Rainier bullet Fed. primers and mixed cases. Dillon told me to increase the belling, I did that but It didn't seem to help??? I like the pistol, but if it won't function reliably it's no good to me. Factory ammo works fine.