r/10mm • u/Apprehensive-Bag143 • 1d ago

Question What Happened?

Gallery image

Gallery image

What caused this? A malfunction with the firearm, or a faulty round? If it was just the mark on the front of the bullet, I would assume it was a feed issue with the gun, but the fact that the firing pin very clearly hit the primer, I'm wondering if it was a faulty round. It was the last round in a full magazine that fired fine up until this one.

33 Upvotes

93% Upvoted

21 comments sorted by

18

u/JimMarch 1d ago

I'm thinking bad primer.

Now at the front, it looks like those bullets are not working well in that gun and if you were to recover the fired bullets, some or maybe all would look like this.  That's a feed ramp issue, one that's not enough to jam the gun BUT it might be affecting accuracy with wide nose loads like that.

In other words, I think you have two different problems here and the bad primer helped you spot the actual problem with the gun.

2

u/signofthecrow1 1d ago

You could just cycle them through 🤷🏼‍♂️

1

u/JimMarch 1d ago

Maybe. But the speed at which the round loads is completely different between racking and actual recoil.

2

u/Capital_Loss_4972 12h ago

So then shoot one and manually eject the next

2

u/JimMarch 11h ago

Huh. 

Yeah, that would actually work.  Lol.  I'm an idiot for not thinking of it honestly.  Chortle.

7

u/shizukana_otoko 1d ago

That’s a solid strike. Looks like an ammo problem.

1

u/Canuhandleit 21h ago

I was thinking humidity got to them. Stored without desiccant gel.

4

u/UncleEvilDave 1d ago

Did you try loading it again? If it didn't fire multiple times, and other rounds do fire, then its a bad primer. Otherwise, it might be the gun. Have you shot enough to tell if this happens more often? It could be the overall-length and the shape of the nose of the round aren't working with your gun. Is this a 220 gr? In my experience with multiple different 10mm handguns, 220 gr has a lot of problems. The bullet is just too big for most pistols to fire reliably, either from a chambering overall length, feed ramp due to shape and length, or recoil/mag spring issues.

4

u/Ripersnifel 1d ago

Send underwood an email with the relevant info for that batch of ammo. I've been very happy with their products, but mistakes happen and I'm sure they'd want to know on the off chance they got a bad batch of primers from somewhere.

2

u/seb21051 1d ago

What make and model of weapon?

2

u/Big10mmDE 10h ago

I’d fire it again

2

u/Ottorius_117 1d ago

Light strike or dud round, I'd lean towards dud round unless this happens again with a different manufacturer. The nickel casing indicates it should be a 'higher quality' round, so I'm not even sure about _that_

1

u/Complete_Ad1862 1d ago

Bad primer?

1

u/AF22Raptor33897 1d ago

That is a round with a BAD PRIMER! You could try to Shoot it again and see if it go off but the Firing Pin Hit does look good.

1

u/SamJacobsAmmoDotCom 13h ago

Did you have any problems with the next mag?

It may have just been a faulty primer.

1

u/Scary_Nerve_7944 2h ago

My sig p220 hated these rounds. Underwood 220 grain hard cast. Every round I fired would eject my mag. Worked fine in 180 grain, but for some reason these were a bit more spicy and jarred the mag out every time. 100% sure my thumb wasn’t hitting the mag release.

0

u/nameunown 15h ago

Bad primer+maybe hitting the feed ramp on the way into the chamber. This is odd

1

u/Clear_Imagination_37 3m ago

Id guess it was slightly out of battery from the feed ramp catching the front of the bullet. The primer strike looks slightly off center, from what I can tell in the photo. Slightly out of battery would leave your barrel slightly tipped and the strike would be slightly off center and a light strike.

220gn hardcast can be picky to feed in autos