Keltec su22 chamber problem

[MXoutdoors]

So i bought a keltec su22 off the EE before christmas and today i got out to shoot it.
Went thru the first 10 shots fine but on the first rd of the second mag i had a miss fire and when i opened the bolt the round was stuck in the chamber.
I had to push it out with a cleaning rod and i found their was rifling on the bullet so it looks like the chamber was not cut right looks to be about .150" to short.
Has anyone seen this before and what should i do about it

 

[little_airwolf]

Crap. When it does shoot, how does it group?
What ammo where you using?

 

[MXoutdoors]

only took 10 shots and i was using federal automatch

 

[redneckchris]

Huh, I herd about that happening recently...
Better ream er out a bit!

 

[MXoutdoors]

Turns out the rims on the ammo I have don't have a flat rim, they have a little bit of a chamfer, so the extractor does not have a flat shoulder to grab onto so it can properly extract a live round.
I tried some CCI mini-mags today, they worked fine so able to extract live round. The cci ammo has a nice flat edge on their rims.

 

[little_airwolf]

Sorta thought it was the ammo.
I loved my su22. Outshot most stock 10/22.
Got a 15-22 so sold the su22.
Fyi the AR mags work and there is a am180 drum mag conversion
Means 180 or 275 round drums work