Most important in .22 rimfire is the chamber.
Typical "sporting" .22 LR chambers are larger in diameter and longer to permit reliable function, free chambering and extraction in semi-auto firearms.
"Match" chambers used in bolt-action and single-shot target rifles are close to maximum cartridge dimensions and are shorter, such that the bearing surface of the bullet is pre-engraved by the origin of rifling upon chambering.
Some hybrid chambers such as "Bentz" are used for semi-auto competition rifles and pistols, in which the rear of the chamber body is similar to the sporting chamber, but the mouth of the chamber is close to max. cartridge and the length of the chamber is such that the bullet impinges lightly against the rifling. The interference fit is not enough to impair semi-auto function, but provides a more consistent shot-start than a sloppy, sporting chamber.
Unplated, greased or waxed standard velocity or match-grade ammunition fired in a match chamber will shoot minute of angle at 100 yards.
Ordinary high velocity ammunition of good quality will shoot under 2 m.o.a. in a match chamber most of the time.
Any .22 LR ammunition which shoots 2-inch, ten-shot, 100-yard groups from a sporting chambered .22 rifle with scope should be considered VERY good and you should go buy it all!