Load CALIBER: 44 Mag CASE:RP BULLET TYPE: RMR RNFP BULLET WEIGHT:240 Gr. Plated POWDER TYPE:Alliant Unique POWDER WEIGHT: 9grains PRIMER TYPE:CCI Lrg Mag SEATING DEPTH: 1.585 I've shot a few hundred of these and they have been doing quite well. On my recent range trip I was shooting five shot strings really dialing in my red dot. All were shot single action hammer cocked. On the fifth run of five shots, in the fourth shot I felt something hang up the cylinder. I stopped and opened the cylinder. Between the back of the brass and the rear of the gun, think between primer and firing pin area, was a piece of shaved copper lead . I was on the end of my time limit sp I packed up, stuck the lead remnant on the load sheet sticker for later review. When I was home I inspected everything. No signs of anything abnormal. The four spent cases and fifth unfired looked normal. The five before that string all looked normal. Cleaned gun. No signs of leading at all. No abnormal fouling anywhere. Checked timing by simply slowly pulling hammer back and confirming cylinder locked prior to hammer set and checked all six positions. Able to run my bore light down barrel and see around it, no visible out of time noticed. (I'm no gunsmith) put light resistance on cylinder to see if the hand that rotates cylinder would slip, all felt good. Inspected part on shell extractor that hand rotates and looks to be in good shape. Only thing I can think is that some shaving happened as the bullet passed the forcing cone. With that said it doesn't clarify finding it on the back rearward side of the cylinder. In contemplation I surmised it may have happened the string prior and upon reload was allowed to fall into that area. Attached is the small shaving and my previous five shot string at 50 feet. Those are 1" grid lines. Thoughts? Over thinking it? Seen it, no big deal?