hi guys I don't know if this is the right place to put this question but I hope some one can answer I have been reloadining 9 mm I fired about a 100 rounds so far no prob but on my last clip I noticed 3 out of the 10 I fired had a black soot mark were the fireing pin hit the primer the round still went off no prob no other over pressure indications primer still seated useing Remington primers 5.5 g of bullseye and 124 g jhp bullets any ideas guys
black mark on primers
- Thread starter ringanator
- Start date
First off, ^^^I fixed it for you
If the firing pin isn't piercing a hole in the primer I wouldn't worry about it, it's just sooty buildup on the firing pin and breach face, I get this after several mags, especially with a dirty burning powder.
Get a magnifying glass and look at the firing pin dent in the primer, is there a pinhole in the primer inside the firing pin dent?
If there is a pinhole in the primer then also check the firing pin tip for high pressure gas erosion.
It could be a weak/bad primer cups, cases slightly longer than the rest and need trimmed, and a damaged firing pin tip.
If there is a pinhole in the primer then also check the firing pin tip for high pressure gas erosion.
It could be a weak/bad primer cups, cases slightly longer than the rest and need trimmed, and a damaged firing pin tip.
update took a good look at the primers could not see any pin hole even whent as far as to blow threw the case and out the primer to see if there was a leak seemed to hold all one psi I could produce lol so I fired 5 more rounds no prob with the primer idk maybe a couple bad primers all the brass I loaded was all new thanks guys and other ideas or things to watch is greatly appreciated ill keep ya all posted
