What stops working? Just the chamber is dirty? I have a similar situation with a 22mag. The rifle stops extracting reliable. I cleaned the barrel already multiple times and still after a few dozen rounds extraction gets difficult with the extractor glinding off the rim. No idea why but very annoying if rapid shoots are required. I usually pry out the rims with the tip of a small pocket knife. What I only recently recognized is that the area on the boltface where the rim sits a rather large amount of dirt has solified. The whole corner area were the rim sits. I used a toothpic to dig out a rather substantial amount of crud. I will see if the problem has been solved.

 

Due to variations in cartridge dimensions,
the chambers for 22wmr are cut a touch loose
to fit the differences in diameter of all the manufacturers.
As a result, the 22wmr can have an incomplete seal
when fired and an inordinate amount of blowby occurs.
Yeah, saami specs say one thing, but in the real world,
there are some sloppy tolerances allowed during manufacture.
You get large amounts of burn residue all through the receiver.
Deposits can end all the way back to and in the trigger group.
Get used to shorter cleaning intervals when using 22wmr.

 

I guess I will stick with 22LR. Never had this issue with it.

 

Eddie, most of the time the 22wmr is used for a few shots in a morning.
No worries for picking off a critter or two.
But extended use, multiple boxes in a short time,
like range use or a visit to pdogtown can require
in field cleaning to maintain rifle function.
Just a quirk of the cartridge to deal with.
For me it's a handy caliber for taking down a predator
causing a stir in the chicken coop. 1 or 2 shots and done.

 

Eddie, most of the time the 22wmr is used for a few shots in a morning.
No worries for picking off a critter or two.
But extended use, multiple boxes in a short time,
like range use or a visit to pdogtown can require
in field cleaning to maintain rifle function.
Just a quirk of the cartridge to deal with.
For me it's a handy caliber for taking down a predator
causing a stir in the chicken coop. 1 or 2 shots and done.

I think your assessment is correct. His problem is the rifle will not feed there is no crud in the raceway or bolt face. VQ may have made a tight chamber preventing crud from being expelled. It is the most accurate 22Mag that I have ever shot. It loves both Rem and CCI ammo and shoots them the same. Thanks to all for responding .

 

My guess is that the bolt is too light and starts moving rearward before the bullet has left the barrel and pressure drops, and is spewing crud out the chamber end as well as the muzzle. I play around with AR 22’s a bit, and without a bolt weight they will do the same, and they are only 22LR. I doubt their is a bolt weight available for the Volquartsen though.

 

What ammo?

 

22mag from cci and remington. 30 grain and 33grain.

 

Yeah Eddie, my hmr is a dirt magnet also.
Some cartridges are tight in the chamber,
some wobble loosely due those varying cartridge dimensions.
Another issue I have is the occasional split neck.
When I have a fail to extract after firing,
the issue is always a split neck.

 

What are you experiencing trouble using to clean the chamber? Anyone using an over-bore size/proper size brush for the actual chamber and maybe C-4 carbon cleaner?
Dropping the bolt on a bolt gun is so easy why not pop it out before trouble and brush the face off. It is a bit harder on a semi-auto but there are small short bristle brushes that can get into an opened bolt port.