.30 carbine issues

[Daniel_187]

So I reloaded some .30 carbine rounds for my Auto ordnance M1 carbine. Well they run good, but all of a sudden the bolt will not go fully into battery. I drop the mag, lock back the bolt and notice very thin brass rings jammed in the chamber. The load is:

13.5 GR of IMR 4227
Primer Winchester small rifle
bullet 110gr sp
OAL 1.685"
Brass is a mix of PPU and Augila
And a light taper crimp
Full length re-size
all trimmed to length

Cheap brass maybe?

[Irving]

Do you have a case gauge?

[Great-Kazoo]

Neither Privi or Aquila are cheap brass. Outside of having a case gauge. Pull your Bolt assy and see how the reloads chamber .

[eneranch]

Brass Rings ?? Was the brass originally crimped and now the metal has worked & it's separating??

[Daniel_187]

Yes, there are brass shavings like little thin rings of the case mouth that are jammed into the chamber. No I don't have a case gauge. The rounds chamber fine till I get a little brass ring from the case mouth jammed in the throat. Is it possible the camber is out of spec? I will run some factory ammo through it and see if it does it with the factory ammo.

[DSB OUTDOORS]

That's usually an over crimp issue. You might try backing off the crimp just a tad. Also if you did not trim your case just a bit. It could be thin from previous crimp.

[Great-Kazoo]

Yes, there are brass shavings like little thin rings of the case mouth that are jammed into the chamber. No I don't have a case gauge. The rounds chamber fine till I get a little brass ring from the case mouth jammed in the throat. Is it possible the camber is out of spec? I will run some factory ammo through it and see if it does it with the factory ammo.

If you're not using and or have access to a case gauge, you should be checking using the chamber of your carbine. Thinking the brass is sized correctly and knowing can be 2 different things.

[Daniel_187]

The only case gauge I found were only for OAL
http://www.lewilson.com/caselengthgage.html

Like this one. I trim them all to length with this
http://www.midwayusa.com/Product/251...der-30-carbine