I just shot a IHMSA match yesterday and developed a problem on my 3rd chicken. The center fire/ rim fire selector on the hammer started to rotate off of the center fire position every time I shot. Either it rotated to the center safety position or all the way to the rim fire position. I had to move it back to center fire position each time before firing the next round. Looking at the pins on the hammer, it looks as if there is a chip on the center fire pin. I don't know if this is causing the problem or not. I was shooting my 357max with 17gr of 4227 and an NOE 180 gr sil bullet. That shouldn't be that heavy a load to be a problem. I guess I may have to contact T/C. Anyone else experience this.