2000Z-71
Member
Well I have been having fits with my 629 Mountain Gun since having a gunsmith perform an action tune on it. I've been experiencing light primer strikes that required a second strike of the hammer to fire the round. At first the gunsmith thought that the mainspring was not holding it's shape. He bent it back to spec and I was still having issues. I replaced the mainspring with a Wolff standard power unit and was still getting light strikes. Back to the gunsmith and he put the factory spring back in and asked to check my re-loads.
He ran a machinists file over the base of the case and stated that my primers were seated too high. I had my doubts they all felt flush to my fingertips and they had finctioned fine in my Ruger single actions and my 5" 629 Classic. He demonstated by marking the base of the case with a magic marker and then showing how the machinists file scraped the ink away from the primer. His theory was that with the primers not seated to their maximum depth, the first hammer strike was seating them and the second was actually igniting them.
Like I said I had my doubts but I was willing to try it. I ran 2 boxes of my reloads today through my Hornady hand primer to ensure that all primers were seated to the maximum depth. The result at the range was that all 100 rounds fired on the first strike without issue. I checked my Dillon 650 when I got home and the primer punch had loosened up a bit. I was able to put about 3/4 of a turn with a wrench on it to fully tighten it.
Lesson learned and I've already called my Smith and thanked him for hios time a patience and promised to bring my 625 in for some work...
He ran a machinists file over the base of the case and stated that my primers were seated too high. I had my doubts they all felt flush to my fingertips and they had finctioned fine in my Ruger single actions and my 5" 629 Classic. He demonstated by marking the base of the case with a magic marker and then showing how the machinists file scraped the ink away from the primer. His theory was that with the primers not seated to their maximum depth, the first hammer strike was seating them and the second was actually igniting them.
Like I said I had my doubts but I was willing to try it. I ran 2 boxes of my reloads today through my Hornady hand primer to ensure that all primers were seated to the maximum depth. The result at the range was that all 100 rounds fired on the first strike without issue. I checked my Dillon 650 when I got home and the primer punch had loosened up a bit. I was able to put about 3/4 of a turn with a wrench on it to fully tighten it.
Lesson learned and I've already called my Smith and thanked him for hios time a patience and promised to bring my 625 in for some work...
