Where should I start trying to correct failing to go completly in to lock up on a 4 inch bushingless bull barrel Rock Island Armory? It hangs up about 1/4 " from complete lock. The ammo is Triton Hi-master 850 fps (5 inch barrel). It does better with FMJ but will sometime hang up with that as well. Also the ejection angles are all over the place is there any way to adjust for this?