Burrs on firing pins

[tonesw6]

I shoot a 12ga Browning XS.
Last summer I was experiencing light, or no primer strikes on occasion.
I put the gun in to the local store. Firing pins and springs were changed out. No Problem.
Now several months later , I notice that both firing pins are burred (but functional).
Is this a choice of ammo prob ? or sub standard firing pin material ?.
Ps. I only shoot around 150 rounds per month.
Cheers. Th

 

[cosmic]

Challenger loads by chance? New pins need to be fitted for length, perhaps you are looking at some custom machining marks?

 

[the spank]

Check the primers on the fired hulls to see if they are being punctured. Punctured primers will damage firing pins fast and as mentioned above the pins may need to be taken down to proper length. If they are a bit long they can puncture primers.

 

[ambishooter]

Can you post picture/s of the burred Firing Pin? Too many factors here. If the source of burring is the Firing Pin itself, maybe the metal used was not properly hardened. The hole where the firing pin exits could be off-center or undersized (highly unlikely but plausible due to differential manufacturing process). Chamber where the firing pin sits is not finished properly causing the firing pin to rub against the inner wall. Diameter of the firing pin chamber is oversized causing a slight play when the firing pin is struck by the hammer. A heavier firing pin spring might be a solution but might cause light firing pin strikes and a no-fire situation.

I shoot a 12ga Browning XS.
Last summer I was experiencing light, or no primer strikes on occasion.
I put the gun in to the local store. Firing pins and springs were changed out. No Problem.
Now several months later , I notice that both firing pins are burred (but functional).
Is this a choice of ammo prob ? or sub standard firing pin material ?.
Ps. I only shoot around 150 rounds per month.
Cheers. Th

 

[The Baron]

Sounds like it could be related to punctured primers, apparently common with cheddite primed ammo (Challengers and Kent are the two I know of) in Browning O/Us, especially the bottom barrels where the pins strike at a slight angle. The problem is the harder primer will tear and tip of the firing pin starts to chip when the pierced primers blow carbon back at them (and into the firing pin channels, which can add to light strikes by gumming up the pins spring/travel). I have this same problem in my 725 on the bottom barrel, so try to shoot only Winchester, Remington and Federal stuff. Which makes me sad, because Kent makes great target ammo so I shoot it in other guns.

 

[cartwheel]

Winchester O/U here- years back I had pierced cheddite primers- one or two every time out to the field (once I started looking for it). Almost all were lower barrel. Didn't have any issues with Federal or Winchester primers. The pierce was just a tiny black dot at the bottom of the striker hit- but over time this cut a divot into the round pin profile. Please post a pic of your pins- it will be obvious if this is your problem.

I fit a new lower firing pin but adjusted it down to the lower end of the protrusion spec (previous pin was within spec but at the high end). I haven't seen a pierced primer since and have shot quite a few flats of challenger (I just shoot whatever I can get the cheapest).