On my last range visit I had at least three instances out of ~50rds where the slide on my 365XL failed to lock back after firing the last round. I was shooting Blazer Brass 115 FMJ. I'm tempted to associate this with my installation of the RDS optic on this pistol but it could also be ammo related. I was working specifically on tightening my grip so I'm certain this was not due to any kind of limp-wristing. I'm curious if anyone else has experienced this after adding an RDS.