![]() 100 years and use will tend to damage a firing pin, instead of being nice and round, they become pointier, and start to resemble the tip of a center punch. So, I tuned up the tip of the firing pin as well. The firing pin wasn't very smooth anymore, and it was a bit too pointed IMHO. This issue dealt with, it was time to examine the firing pin, more disassembly. The hammer adjustment screw was tightened down snug, so I loosened it. Not an easy adjustment, as the action needs to be disassembled. In a Winchester '97, the hammer spring tension is adjustable. My first order of business was to check the tension on the hammer in my '97. the cup will not be able to stretch evenly over curvature of the primer, it will fracture or tear. ![]() Once dented, the firing pin will eventually start piercing primers, or allow the anvil to pierce the primer, because the firing pin surface will not be smooth anymore. Even if the cup can withstand this blow, if the firing pin is long enough and the hammer spring strong enough, the anvil will eventually dint the firing pin. The anvil, being a bunch pointier than the firing pin actually pierces the cup. In fact, it drives the primer cup into the anvil of the primer with enough force that the anvil dents the cup. As you can see, the firing pin drives fairly deeply into the primer cup. It's been my experience that most shotguns have a pretty stout hammer/striker spring. They are for the purpose of illustration. I knocked apart a few fired 209 primers from my spent primer tray, it's entirely possible that none the primers in the picture weren't fired in my '97. The purpose of the pictures is so I can better describe the entire situation, the what happens. Once damaged, the frequency of primer piercing will increase, making the situation worse, until the firing pin will need replacing. The super heated, high velocity of the escaping gases can very quickly erode the tip of a firing pin, gas cutting IOW. My first order of business was to examine the firing pin. To every issue there has to be a root cause, that's just the way life is, Cheddite primers are a bit thinner in the cup than some other 209 primers, but changing to a different primer would be the same as turning up the radio when the engine in your car starts making noise. However, visual inspection of my first test firings showed up some pierced primers. My load data did call for Cheddite primers so all was golden. The hull I was working with was a pre-primed Cheddite, and as such came primed with Cheddite primers. My recent project was loading some 16 gauge 2 9/16" ammo for my turn of the century 1897 Winchester shotgun.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |