Misfire on Marlin 336

[kenhwind]

Still have it?

No, we sold it years ago, it was actually my brother's. I put new firing pins in it and sometimes it would fire and then not fire. When I have misfires one of the first things I do is shoot factory ammo. Whenever I get a new or new to me firearm, I always shoot some factory ammo out of it first.

 

[gambleone]

Agreed, he's on the right path, sounds like. By far, the most common cause is old oil/dirt gumming up the free travel of the pins. If that's good, just make sure fp travels freely, check protrusion and if all looks good, I'd try a mainspring. Never seen the primer pocket too deep unless they were improperly cleaned/deepened..but I suppose it's possible. Check them against brass that goes bang with a depth mic. More likely IMO is the primers not bottomed out but I think you covered that. Might be worth a 2nd look though.

Thanks for your info Mike. I'm going to take that bolt apart again just to make sure.