CZ 22 chambers...Std or Match ?
- Thread starter boxhitch
- Start date
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
If you want to stay with the factory pipe, the match chamber is the better option to start with. not seen any issue feeding SK/Lapua type ammos.
If you plan on reaching out in PRS, then the barrel spec and ammo choices are pretty defined. Let me know if I can help with set up.
Thanks
Jerry
If you plan on reaching out in PRS, then the barrel spec and ammo choices are pretty defined. Let me know if I can help with set up.
Thanks
Jerry
The question is whether a CZ match chamber is worth it.
CZ offers a match-type chamber in some of its mass-produced factory rifle models. What does that mean?
It means the CZ match chamber is going to be not as long as on CZ models with standard CZ bolt action .22LR rifle chambers. It also means that in the match the bullet will engage the rifling of the bore, whereas with the standard CZ chamber the bullet will engage the rifling not at all or only a very little bit.
A standard CZ chamber will allow the chambering of a wider variety of ammos. Inexpensive and bulk ammos will have a wide range of dimensions which will fit in chambers that have generous dimensions. These ammos can't be expected to shoot accurately. A match-type chamber will welcome ammo that's made more uniformly to CIP/SAAMI ammo specifications. Such ammos are match-type ammos and these can be expected to shoot much better than other .22LR ammos.
While match-type ammo can be easily shot in a non-match chamber, a match chamber offers a better beginning for accuracy.
The match chamber in a CZ rifle will not in itself make the rifle more accurate, but it can contribute. As far as the rifle itself is concerned, accuracy will be more the product of the quality of the bore. Not all bores are equal, however, especially on mass-produced factory rifles.
For the best potential for accuracy, a match chamber with match-type ammo is the basic and necessary starting point.
CZ offers a match-type chamber in some of its mass-produced factory rifle models. What does that mean?
It means the CZ match chamber is going to be not as long as on CZ models with standard CZ bolt action .22LR rifle chambers. It also means that in the match the bullet will engage the rifling of the bore, whereas with the standard CZ chamber the bullet will engage the rifling not at all or only a very little bit.
A standard CZ chamber will allow the chambering of a wider variety of ammos. Inexpensive and bulk ammos will have a wide range of dimensions which will fit in chambers that have generous dimensions. These ammos can't be expected to shoot accurately. A match-type chamber will welcome ammo that's made more uniformly to CIP/SAAMI ammo specifications. Such ammos are match-type ammos and these can be expected to shoot much better than other .22LR ammos.
While match-type ammo can be easily shot in a non-match chamber, a match chamber offers a better beginning for accuracy.
The match chamber in a CZ rifle will not in itself make the rifle more accurate, but it can contribute. As far as the rifle itself is concerned, accuracy will be more the product of the quality of the bore. Not all bores are equal, however, especially on mass-produced factory rifles.
For the best potential for accuracy, a match chamber with match-type ammo is the basic and necessary starting point.
I get what the potential should be in theory, and being relegated to using premo for best results
doing some digging to see if the premium stuff is dimensionally different and whether all 'match' labelled ammo is this same dimensions or just sales hype
seems not all 'match' is created equal
doing some digging to see if the premium stuff is dimensionally different and whether all 'match' labelled ammo is this same dimensions or just sales hype
seems not all 'match' is created equal
The 22 Winchester Rimfire is a different round and not the same as 22 Long Rifle.
SAAMI and CIP set the specs for ammo and chambers. SAAMI generally applies to North American factory rifles. There is a SAAMI Sporting chamber and a SAAMI Match chamber. CIP, which includes most European firearms makers, has one set of specs that establishes the minimum/maximum dimensions allowed.
Note that every CZ .22LR will follow CIP specs. The chamber dimensions shown below for CIP are the minimum allowed. The CZ match chamber will be closer to the minimum dimensions permitted by CIP while other CZ bolt action rifles will have longer chambers.
There are a number of Match chambers that are made for custom barrels, and some of them are shown in the last image.
CIP 22 Long Rifle, below.
Below, SAAMI Sporting chamber and Match chamber specs.
The reamer dimensions for some custom Match chambers as well as others.
SAAMI and CIP set the specs for ammo and chambers. SAAMI generally applies to North American factory rifles. There is a SAAMI Sporting chamber and a SAAMI Match chamber. CIP, which includes most European firearms makers, has one set of specs that establishes the minimum/maximum dimensions allowed.
Note that every CZ .22LR will follow CIP specs. The chamber dimensions shown below for CIP are the minimum allowed. The CZ match chamber will be closer to the minimum dimensions permitted by CIP while other CZ bolt action rifles will have longer chambers.
There are a number of Match chambers that are made for custom barrels, and some of them are shown in the last image.
CIP 22 Long Rifle, below.
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Below, SAAMI Sporting chamber and Match chamber specs.
The reamer dimensions for some custom Match chambers as well as others.
Based on the CIP minimum chamber info provided, and that "tightest specification that CIP will allow" = "CIP minimum chamber" then:
Dimension A = .2268"
Dimension B = .2252"
Dimension C = .6000"
Dimension D = 5 Degrees
Dimension E = .288"
would be the CZ match chamber dimensions for the 457 MTR and 457 LRP.
Note, CIP Bore minimum dimensions are tighter than SAAMI and Lilja "tight".
CIP Bore = .212"
Lilja "tight" Bore = .215"
SAAMI Bore = .217"
CZ Bore = .211" - source https://cz-usa.com/support/faq/
A: Our 22 LRs use our cold hammer forged and lapped barrels, and are built a bit tighter than many other guns. In 22 LR we run a .211 bore, which is one of the reasons our .22s are known for incredible accuracy. This also means that a .17 or .20 rod and jag are required for cleaning, since a .22 rod will be too large.
Dimension A = .2268"
Dimension B = .2252"
Dimension C = .6000"
Dimension D = 5 Degrees
Dimension E = .288"
would be the CZ match chamber dimensions for the 457 MTR and 457 LRP.
Note, CIP Bore minimum dimensions are tighter than SAAMI and Lilja "tight".
CIP Bore = .212"
Lilja "tight" Bore = .215"
SAAMI Bore = .217"
CZ Bore = .211" - source https://cz-usa.com/support/faq/
A: Our 22 LRs use our cold hammer forged and lapped barrels, and are built a bit tighter than many other guns. In 22 LR we run a .211 bore, which is one of the reasons our .22s are known for incredible accuracy. This also means that a .17 or .20 rod and jag are required for cleaning, since a .22 rod will be too large.
CZ doesn't publish information about the exact dimensions of their "CZ match chamber". It's not necessarily the minimum CIP dimensions. It can be taken as a given that it's smaller than standard CZ chambers.
CZ doesn't have a .211" bore. That wouldn't be permitted under CIP. CZ seems to have rounded down.
Below is a chart made and provided by CZ. It compares the CIP specs with those of SAAMI. For convenience, 5.38mm is 0.2118".
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I shoot a 457 Varmint 20” non match chamber in my local orps/Crps matches. It hangs with anything else on the line when shooting SK standard or rifle Match. But... it has a nasty cold bore shift, especially when the temperature is low.
First shot is always 1.5” low at 50 yds
I’ve tried everythingthat I know of. headspace, carbon ring, action torque. And can’t seem to get to the bottom of it. After struggling with this issue for a year I’ve finally pulled the trigger on a 22” schnooble IBI.
I’m looking forward to pushing the balance point a bit further forward, and of course a little more consistency.
First shot is always 1.5” low at 50 yds
I’ve tried everythingthat I know of. headspace, carbon ring, action torque. And can’t seem to get to the bottom of it. After struggling with this issue for a year I’ve finally pulled the trigger on a 22” schnooble IBI.
I’m looking forward to pushing the balance point a bit further forward, and of course a little more consistency.
I know this is old, but I was wondering if you got the ibi barrel and if you noticed a difference? I just got a synthetic 457 with the non match action. I have an LRP stock I got for free, and my intention was to get an ibi barrel as well. I shoot a lot so the synthetic was half the price of a 16 inch MTR and thought since I already have the stock, and I shoot so often I'm not always using the premium ammo, I'd be happy with a regular 457 action and then put the money I saved into a better barrel, bipod and trigger upgrades. I can upgrade slowly and just shoot as much as possible to improve my consistency as I think that would help me more than a steeper upfront cost...i went back and forth a lot but felt if I have the stock I really like, lighten the trigger, and get a quality barrel, such as IBI, if could be nicer than a 16" MTR, the main difference having a 22" barrel but not a match action...
Marketing hype for the US. All barrels are made with "mandatory" CIP chambers in Europe. Only barrels roll stamped CZ USA are sold as "Match" because, guess what? The CIP tolerance falls within the SAAMI "Match" standard; BTW, SAAMI are not mandatory standards, only voluntary. I noted also that not only are "match" barrels marked CZ USA but they are only available with the north american 1/2-28 barrel thread. Barrels marked C ZUB have European threads (1/2-20)
BTW, they sell in the US for about $100 more than a C ZUB barrel. Good marketing/money grab.
Bottom line is you will have a better chance winning the barrel lottery with CZ than you will with Savage.
I bought a brand new take off C ZUB varmint barrel, and I was so tightly headspace that I had to shim to barrel out so the bolt would close with minimal resistance. I sure hope the aftermarket was a good one, because, this one would be virtually impossible to improve upon.
Best advice: Shoot your damn rifle before discarding untried parts. You will likely be very pleasantly surprised with what your CZ came home with.
BTW, they sell in the US for about $100 more than a C ZUB barrel. Good marketing/money grab.
Bottom line is you will have a better chance winning the barrel lottery with CZ than you will with Savage.
I bought a brand new take off C ZUB varmint barrel, and I was so tightly headspace that I had to shim to barrel out so the bolt would close with minimal resistance. I sure hope the aftermarket was a good one, because, this one would be virtually impossible to improve upon.
Best advice: Shoot your damn rifle before discarding untried parts. You will likely be very pleasantly surprised with what your CZ came home with.
Depends on how accurate you want and if the ammo is available
Match chamber shoot sk rifle match (accurate)
standard chamber shoot cci standard velocity. A wee bit oversized not great in the match chamber (great value)
PRS try match chamber and SK long range match
Match chamber shoot sk rifle match (accurate)
standard chamber shoot cci standard velocity. A wee bit oversized not great in the match chamber (great value)
PRS try match chamber and SK long range match
To be clear, there are two chambers used on CZ barrels bolt action rifles and both are made to meet CIP specs. Those with the CZ "match" barrel have a chamber a little closer to the minimum dimensions allowed than the other.
CZ makes its barrels in the Czech Republic. All meet CIP specs. CZ makes barrels with muzzle threading for European markets and for North American markets. Chambers remain the same regardless of muzzle threading.
SAAMI specs don't concern CZ just as they don't concern other European manufacturers who make rifles with "match" chambers such as Anschutz. There's no regulation that requires North American .22LR barrels/chambers to have SAAMI specs. When they do, it's because the manufacturer chooses to follow SAAMI as a standard.
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The chamber alone doesn't determine a rifle barrel's accuracy performance, it is only one potential factor.
The most important factor is bore quality, which combined with a good chamber and good ammo will have the best chances for good accuracy performance.
No one should think that a good chamber and a good bore will make below average .22LR ammo into something else. As always with .22LR, when looking to improve accuracy performance the most important part is ammo selection. Regardless of make, barrel, or chamber, no rifle will outshoot the ammo it's given.
