Match chamber
- Thread starter FLYBYU44
- Start date
Generally a tighter than saami spec chamber. Often more accurate but ammo picky. Often will have the bullet engage the lands when chambering a round and will not necessarily eject a live round well. I am sure others will chime in with more details.
There are a lot of match chambers for .22LR, many of them very similar. The basic thing to understand is that the standard sporting chamber is usually quite generous in its dimensions compared to a match chamber.
SAAMI provides specifications that are followed by North American factory firearms makers. SAAMI has specifications for a sporter chamber and for a match chamber. Sporter chambers will generally allow the chambering of all .22LR ammo, even those who are not always made to with the strictest attention to individual round dimension specs.
Compare the dimensions of the SAAMI sporting and match chambers shown below, especially the length and diameter at the leade end.
CIP, which provides specifications for CIP member countries, which include most European nations. CIP specs show the smallest dimensions permitted. CIP chambers on sporting, non-match, rifles will usually be a little longer to help chamber a wide variety of .22LR ammos.
A CZ match chamber will have dimensions, especially length, that are less generous than those in models with standard .22LR CIP chambers.
It's worth noting that, while a CZ match chamber may improve performance in a CZ rifle, more important is the quality of the bore on the individual barrel. Not all bores/barrels are the same and some will be better or worse than others.
SAAMI provides specifications that are followed by North American factory firearms makers. SAAMI has specifications for a sporter chamber and for a match chamber. Sporter chambers will generally allow the chambering of all .22LR ammo, even those who are not always made to with the strictest attention to individual round dimension specs.
Compare the dimensions of the SAAMI sporting and match chambers shown below, especially the length and diameter at the leade end.
CIP, which provides specifications for CIP member countries, which include most European nations. CIP specs show the smallest dimensions permitted. CIP chambers on sporting, non-match, rifles will usually be a little longer to help chamber a wide variety of .22LR ammos.
A CZ match chamber will have dimensions, especially length, that are less generous than those in models with standard .22LR CIP chambers.
It's worth noting that, while a CZ match chamber may improve performance in a CZ rifle, more important is the quality of the bore on the individual barrel. Not all bores/barrels are the same and some will be better or worse than others.
6.5 shooter
CGN Regular
- Location
- Medicine Hat
Think of it like a WW2 Lee Enfield vs a new modern rifle. The Enfield was designed to work no matter what, newer rifles need a bit more TLC.
Thanks for the prints, I have a machining background and that helps a ton. Guess your not jamming Stingers in a match chamber huh? 
The rifle I was specifically interested in was the CZ 457 MDT, comes with larger bolt knob, 20MOA Rail, fluted 20" barrel with match chamber and of course the aluminum chassis. The two CZ rifles I have shot in the past where phenomenally accurate. My current rig is a Savage Mk2 in a Boyd's stock. Weighing on whether I want to spend triple for the CZ or keep tinkering with the Savage.
The rifle I was specifically interested in was the CZ 457 MDT, comes with larger bolt knob, 20MOA Rail, fluted 20" barrel with match chamber and of course the aluminum chassis. The two CZ rifles I have shot in the past where phenomenally accurate. My current rig is a Savage Mk2 in a Boyd's stock. Weighing on whether I want to spend triple for the CZ or keep tinkering with the Savage.
What one calls a match chamber might vary significantly from the next version.
Descriptions of Winchester 52, Anschutz, Eley . . . and the list goes on with sometimes very little variation.
Stingers or "Stangers" in a match chamber is probably no a good idea but somewhere I saw specs for a Stinger Chamber.
Descriptions of Winchester 52, Anschutz, Eley . . . and the list goes on with sometimes very little variation.
Stingers or "Stangers" in a match chamber is probably no a good idea but somewhere I saw specs for a Stinger Chamber.
I have a Mk2 heavy barrel in a Boyd's At-One stock. Nothing crazy, just not as accurate as I want. Still trying out some different ammo with it, but I am struggling to get under 1 MOA with it. My previous CZ rifle would easily do that with most ammo.
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
Thanks for the prints, I have a machining background and that helps a ton. Guess your not jamming Stingers in a match chamber huh?
Bed the action in the stock. Feed it SK rifle match and Lapua CenterX... maybe a couple of different lots just in case.
If these do not shoot acceptably, get another rifle.
Jerry
Thanks for the prints, I have a machining background and that helps a ton. Guess your not jamming Stingers in a match chamber huh?
A CZ match chamber in a factory CZ barrel will not in itself guarantee good results. The barrel/bore quality is even more important in determining the rifle's accuracy potential.
Compared to a typical Savage barrel, an average CZ barrel, while also mass produced, generally enjoys a deserved reputation as the better one.
At the same time, however, a good chamber and a good bore will not make ammo shoot better than it can. No rifle can outperform the ammo it's given.
Thanks Jerry, I appreciate your wisdom on this. I plan to bed it very soon. Currently I have filed down the spring mount on my accutrigger so I can drop my weight right down. The trigger is fantastic. I have also purchased both the brand's you mentioned. If I'm being honest, the Savage is a fine rifle. But it's like a Ford Mustang and a Ferrari, both do the same thing, one is more refined and looks ###y. So I may yield to temptation and buy the CZ. Will it shoot $1000 better than my rifle? Not a chance. I do prefer Savage magazines to CZ, simply because they work great, are cheap and you can find them anywhere.
The nut behind the trigger is at least half the issue too. I have owned a few nice rimfire rifles in the past and shot in a couple competitions with them. I am not the best shot, but with a good rifle I can do decent. My last one I came in fourth, but was the only guy with iron sights. You can shoot pretty good with iron sights, a good rifle and a spotting scope. That was 50m, beyond that I need a scope.
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
MKII is a great design made for the least amount of money... They clean up very nicely and work slick as any top tier rifle WHEN, all QC issues are addressed.
Get rid of all the sharp corners. Mags will likely need to be sorted out too for fit and from splitting. Extraction is another 'why not just fix it at the factory' problem
So far, most of the rifles I have played with had great barrels... and they all responded well to SK RM and Lapua CX.
I have owned various BRNO rifles and competed with them. A number of CZs for friends and customers. Very nice design and often, little fuss out of the box. Their match chamber actually is a tighter chamber and can respond very well to the better match ammo. SK LRM seems to be considered faves for a number of shooters. These barrel definitely need to test the upcoming Lapua 'fast' ammo.
For mid range shooting (out to 300yds), MKii can do very well with the right TLC. Like so many US manf rifles, why not just charge $50 more and offer a rifle that will run to its potential out of the box?
Good luck and I hope you get yours sorted.
Jerry
So far no extraction issues with mine. I purchased two bolt kits off the EE here for it. So if that creaps up I will double up my bolt spring. Had to do that on every other one I have owned. My son has an old Lakefield Mk2, my mags work in his gun, but his bolt is completely different, much better design.
My current rifle and target from my last outing. Circles are 2" in diameter. I have right around $500 in this setup. Targets were shot with that cheap Tac22 stuff that Cabela's had on sale. All I had on hand unfortunately.
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