What kind of accuracy can one expect at 100 metres (110 yards) with that rifle ? I know that CZ rifles are incredibly accurate in 22 LR. I have one 22 LR 452 Silhouette model, but in 22 Magnum how is it ?

I would expect with the ammo it likes 1-1/4"

Like almost all rimfire firearms, I would expect the degree of accuracy of your rifle is capable of producing to be very ammunition dependent.

Standard disclaimer; "YMMV and since my experience is mine alone, your experience is likely to be different.".

Jeff