We cleaned it after each trip, shooting a partial to full bulk box of 500. We shot Remington golden bullet, federal and Winchester. I was going to try cci mini-mags yesterday, but before I even started to try them the bulk were failing to feed/jamming from slide lock.
The round that had the plating shaved off never made it out of the magazine. The barrel looks fine inside and out and is secure to the frame. The magazines have occasionally required a little more force to lock into place, so it is possible that they are the weak link. They are the factory issued ones, and I really don't see ordering new ones fixing the problem.
Whatever the case, the issues are a little beyond my gun knowledge. The store I got the gun from is a good little shop with a decent smith, so I imagine he will be able to help diagnose the problems and get ruger to fix it.