With what do you disagree? That the CZ standard of 2 MOA means a CZ is not defective? That the vast majority of CZ barrels are average for CZ barrels? That it's necessary to use really good ammo to achieve really good results?
I said "if a CZ rimfire rifle is purchased for target shooting, it may be a little disappointing to many shooters. The result is that they do not keep them." Here's why.
The only CZ bolt action .22LR with a
written guarantee of accuracy are the 457 models with the CZ "match" chamber, which are the MTR and LRP rifles in .22LR.
CZ itself says "
Selected models in the .22 LR calibre, such as the CZ 457 MTR, have a Match cartridge chamber at the very edge of the CIP tolerance. Very precise production and low tolerances provide an excellent accuracy guarantee of 1 MOA depending on the ammunition used."
See h t tps://www.czub.cz/en/firearms-and-products-family/cz-457#:~:text=Selected%20models%20in%20the%20.,depending%20on%20the%20ammunition%20used
To be sure, there are CZ's in all models that do even better than 1 MOA for the match chambered models, or 2 MOA for for the other bolt action models in .22LR, but it all depends on a particular rifle having an exceptionally good CZ factory barrel. But the average barrel, the one most likely to be on any rifle, is the one most shooters will have. A few unlucky CZ buyers will have a poorer-than-average barrel.
But without good ammo that suits the barrel well, consistent accuracy will be elusive. This holds for all rifles. Even better rifles/barrels aren't going to regularly shoot inexpensive ammo well. While it's usually much better than high velocity bulk ammo, CCI SV is not an especially good ammo. Take a look at the 1/2" challenge where the vast majority of successful entries have used ammo that's typically much better than CCI SV. While an ostensibly "better" ammo like SK Standard Plus is a step up from CCI and usually produces superior results, it is not sufficiently consistent to reliably meet CZ's accuracy guarantee of 1 MOA for the MTR and LRP rifles.
If MOA accuracy is the reasonable standard of accuracy here, some CZ bolt action .22LR rifles meet it. But it's not a sure thing. Take a look at how many factory CZ rifles have qualified for the 1/2" challenge. While merely suggestive and not conclusive or scientific, for a brand that sells very well and is in the hands of many shooters, they aren't represented in significant numbers. Of the approximately 200 successful entries in total, there are about 30 stock CZ's without match chambers, about three with factory match chambers, and an additional eight or so custom CZ rifles with aftermarket barrels.
The average CZ doesn't make a consistent 1/2" shooter "all day". It's important to keep in mind that this is neither supported nor refuted by the experience of a single or a small number of CZ rifles. It is characteristic of the average CZ rifle. Of course, with enough attempts, a few very small groups are possible with almost any decent rifle. But target shooters want consistency, results that are repeatable, not the result of chance. That's why I said that in the end, if a CZ rimfire rifle is purchased for target shooting, it may be a little disappointing to many shooters. The result is that they do not keep them.
