Mine (22 lr) has been great it is an average half inch (some better some worse) gun with most everything else under an inch (50 yds). CCI Standard Velocity shoots 3/8 to 1/2 inch. And I have shot a lot of brands through it.
Steve..........
Pretty much the same here. An honest 1/2 group at 50 with the CCI standard velocity. Solid and hollow point. I really like mine. A good rifle for the money.