I've been using the above mentioned rifle in Cowboy Action shooting for 19 years now and I have started to have problems after about 12,000-14,000 rds down range. When I cycle the action the ammunition from the tubular magazine is picked up and chambered properly. Problem is that the hammer drops also requiring me to manually pull back the hammer in order to shoot the rifle. I figure that I have worn parts, I'm just not sure which ones. And thoughts?