I have a XIX in 44 magnum caliber that I purchased in 2000 in California.
The last two times I've taken it to the range the firing pin retainer, pin and spring have fallen off after about 30 rounds being fired.
I put them back in and can fire anywhere from 50 to 200 more rounds before it happens again.
The retainer does not show any abnormal wear, and no damage is evident around the retainer area.
Any ideas as to why this is happening, and any suggestions as to how to fix it?