CZ457 chambers question

[dero338]

I didn't get info on chamber specs on their website. do they have match and sporter chambers like some others? and how much accuracy increase should I expect compare to the markII

 

[Tokay444]

Depends on which model you’re asking about.

 

[grauhanen]

There are two CZ 457 .22LR models with the CZ "match chamber". They are the CZ 457 MTR and the CZ 457 LRP.

CZ hasn't published any specs about the dimensions of the CZ "match chamber". It must by law, however, conform to CIP specifications for chamber dimensions.

Below are the CIP .22LR dimensions. These are presumably the minimum dimensions allowed. How close to these minimum dimensions the CZ match chamber measures is not known. Other CZ sporter rifles may have larger chamber dimensions than the CIP specs. Shooters should be aware that rifles made to SAAMI specifications have different dimensions. There is a SAAMI sporting chamber and a SAAMI match chamber and the specs are shown below.

 

[dero338]

tanks, that's the info I was after. it looks I either need to restock a MTR or try a varmint and rebarrel if needed