10/22 New GM barrel causing jams?

[H&K_Dude]

I have replaced my stock and barrel. Now I seem to be having feeding problems. First picture is where the round is getting suck. Second is how the bullet its self is getting shaved by the barrel. Factory 10rd clip used.

Third picture is interesting because something scratched the bullet while it was still in the clip.(never chambered. )

I have tried
• Deep clean of the gun
• Disassembly of factory clip (cleaned too)
• Adjustable V block to correct barrel droop.
• Mean looks, progressing into foul language.

Any suggestions would be appreciated. Even stupid ones. :banghead:

 

[Coal Dragger]

Hmmmm.....

It seems to be hanging up on the bottom of the chamber, so you could have any number of problems. Your new barrel could not have the chamber properly centered at the breech end where it mates with the receiver (not very likely), the chamber could be too tight for reliable operation in a semi-auto (most likely), or as mentioned you could have the torque on the V block improperly set. The V block is at the bottom as I recall and if it is loose it will allow the barrel to droop a bit using the receiver as a fulcrum, thus moving the bottom of the chamber up a bit in relation to where it should be. Under normal circumstances with a normal factory barrel and chamber this would be a non issue, but if you have a tight match chamber it could be an issue. So my advice would be to torque it down as tight as you dare and see if that works.

 

[ms6852]

You also mentioned that you replaced your stock. Insure that the magazine is well placed and flush with the receiver action. I had a similar issure when I replaced a stock a while ago. I had to take it apart and got some 400 grit paper to smooth out some edges that were preventing the magazine to catch flush with the receiver, even though it was locking in place.

 

[karlb]

When I replaced my 10/22 barrel with an ER Shaw, I began having feeding problems. I figured out that the barrel was installed crooked. I used deeper gauges on both sides of the V- block to make sure the barrel was centered and then tightened. No more problems.

 

[TonyAngel]

Looks like an excessive amount of barrel droop. When you installed the barrel, did it just drop right in and flop around requiring the v-block to hold it in place? If you're barrel to receiver fit is really loose, you can try bedding the barrel into the receiver. As for torquing down the v-block bolts, don't just crank down on it. The v-block is only supposed to be there to keep the barrel in place and does not require excessive torquing. Mine are torqued to 10 in-lbs. Just enough to keep the barrel from moving forward.

 

[H&K_Dude]

Thanks for all the suggestions.

TonyAngel I do have any adjustable V-block to compensate for barrel droop.

Swapped it for stock barrel and shoots fine so...

After talking with Green Mountain some more looks like they are going to take it in for repair. No cost to me shipping is nice. Guy was nice over the phone too. Good customer support IMO.

 

[Picher]

Here are a few things to consider:

1. Is the extractor holding the rim too tightly against the bolt to allow the rim to slide up the bolt face as the bullet enters the barrel? Also related: are the extractor edges too sharp, also impeding cartridges from sliding upward. (Just take the bolt out and see if cartridges can easily slide upward on the boltface at the angle necessary to hit the chamber.

2. Is the breech at the chamber too sharp, cutting into the bullet?

3. Is the bolt recess face rough, not allowing the rim to slide upward easily?

4. Ruger magazines are usually excellent. If you're using after-market mags, go back to factory ones. If it happens with a factory mag, try another one.

 

[H&K_Dude]

I think it is just the breech at the chamber is too sharp.

But I was thinking my bolt recess face is rough but it looks like it was fabricated that way. Should it be smooth?

 

[Picher]

Yes, It should be smooth, so a round can't hang up on it. I just polished the bottom of my CZ 455 bolt and bolt recess and it made a heck of a difference in feeding!

JP

 

[H&K_Dude]

I am happy report this has been fixed. I would say for those experiencing similar problems polishing the bolt face so that the round could slide up is Key. Green Mountain was great with customer service, they ended up opening up the chamber a bit I am certain that helped too.

Thanks for all the input.