Match chambers are not only tight but short. That means the rifling leads engage the bullet so there is no jump on ignition like on a non match chamber. Once that happens the bullet is literally screwed into the bore and so pulling it out with a spring loaded extrac is gonna be difficult .
Once fired the extraction is unimpeeded.

 

So, they are referring to trying to extract an unfired round?

 

“On their site, it states Extraction of unfired ammo is not guaranteed with this chamber.”
Apparently 😎😊

 

Has anyone installed one of these? If so, did you have any problems with extraction? On their site, it states Extraction of unfired ammo is not guaranteed with this chamber.

CZ 455/457 22LR .900" x 26" - Lilja

These barrels are a true match-grade barrel, we only have one grade for all of our barrels, our best. All of these barrels are made from 1" diameter 416 alloy rifle-barrel-quality stainless steel. Every barrel is drilled, reamed and rifled in our shop followed by a stress relieving heat...

riflebarrels.com

Yes, as you said, unfired rounds. I have a Lilja barrel on a Sako Quad and would highly recommend one!

 

Rounds on my new 457 Varmint 22LR seem to take quite a bit of force on the bolt closing with 3 different types of ammo. Seems to shoot pretty fair. Only shot at 25yds so far though.

 

As far as accuracy, imo the curtain goes up 😎 at 50 yards - 25 is not enough to draw any real conclusions.
The bolt on the stock Varmint, with its sporter chamber should close maybe not under just gravity 😎, but very easily.

 

That's what I was thinking! Yep, 50yds will tell the real story. Not quite sure what to think about the tight chambering though.

 

Fired cases usually come out but I have a small pry bar on my keychain just in case. Unfired can be pried out easily. Carson Lilja is making a great barrel, go for it.

 

Glad to hear this! Carson told me 2 days ago my barrel is on schedule to be here at the end of the month.

 

I run 2 of the lilja barrels in 457's and they both eject live rounds...which I only shoot lapua ammo in them..

 

That's good to know Thanks!

 

Sometimes at a cease fire , you get caught with a chambered unfired round,
if it doesnt eject when you pull the bolt back to lock it, then you have to fish it out yourself, a little flat head screw driver does the trick for me.

 

I have a a .900 22in in my CZ457 MTR and it shoots very good. I also have a 26in .900 that will ship and the end of the month for another CZ457 in a NRL chassis.
The 22in does have a tight match chamber and most if the time will not extract a loaded round. I have had zero issues with it extracting fired rounds.

 

I have a 26" Lilja on my 457. About 1000 rounds through it. Never had it not extract a fired round.
Never had the situation to extract an unfired round, so no experience there.
I do keep a 4" brass screwdriver at the ready in case a round needs to be pried out of the chamber. Have never needed to use it to date.

 

I have this same barrel a MTR, no issues.

 

Adding a shim to the barrel gives you more headspace. Adding a shim to the bolt gives you less headspace..

 

I have 2 Lilja barrels in my CZ's at 22in and 26in ( Just got it last week) both are .900. When you install these barrel you NEED to head space them cause every action is different. On the 22in barrel I had to use .008 barrel shims to get the .043 head space I was looking for, on the 26in it was .005 to get the .043. The 22in barrel shoots Lapua Center X the best and SK Match and Eley match ok but hates any RWS. The 26in shoots Lapua, RWS , Eley and SK very good. As with most 22lr the more the ammo cost the better it shots with Midas+ and TENEX shooting the best. I can eject live Lapua and SK but neither barrel will eject live RWS or Eley.
There are some good YouTube video's on how to headspace a Lilja barrel.

 

My 26 inch lilja also took a .005 shim for a .043 headspace.. my 23 inch took .006

 

Gixxer2000 sir thank you for your input, well done.

Signalman 🚦

 

I'm no expert at this, but I'm learning. I recently installed a Lilja 26x1in drop-in on my CZ 457 MTR Varmint and set the head space to .043 as suggested by most sources as a standard. In the process of testing different ammo. SK Match Target Rifle (made by Lapua), Wolf Match Extra (made by Eley) and Norma Tac-22 (made by RWS) loaded and ejected fine, though the TAC-22 was all over the place - POA. Tried Norma Match and it shot tighter groups than the SK and Wolf, but rim thickness on the second box was bigger and I had a hard time ejecting - 5 or 6 empty rounds did not eject and I had to use a knife to dig the casings out. Seems that if I wanted to shoot Norma Match as a cheaper alternative to higher quality/expense ammo, I'd have to re-shim to .045 or so. Not keen on that. Next I have a brick of Eley Match to try. Can't find Lapua Center-X anywhere. The process is ardous and a bit expensive, but I'm sure I can find one or two ammos that meet my objetctives: consistent sub-moa at 100, and consistent hits on a 5 in. steel at 300. Suggestions welcomed.

 

I found the same with Tac-22, but didn’t try the Norma Match. I may need to give that a try.
I run Lapua Center-X and it was beat out by SK LR surpisingly! I have yet to find another lot of LR that shot as consistent as the last batch. Wish I’d have bought a heck of a lot more of that lot by by the time I tested it, it was all gone from the supplier I bought if from.

 

Thanks - SK LR is on my list to try after the Eley. To purchase specific lots of ammo, you might give Whidden a try - whiddengunworks.com

 

Yes thats one of the places I buy from.