RE: Crossbow scopes on rimfires?!?!?!
A bullet flyes a lot different then an arrow. I am sure the arrow is going to have much more arch. The scope manufacturer's most likely did a study on how arrows fly out of crossbows then set up the scope marks to match. I have been hearing things like 10, 20, 30 & 40 yard marksin the scope due to rise and fall of the bolt. A22would most likely, at those ranges, just useone mark due to a flatt projectory.
If you were bent on using the scope, put a large card board target at 50 yards and 100 yards and shoot the 22 using all marksat one point and see where each line hits. Thiswill give youwhat lines to use for what range. I think the large difference may put you over the target. It don't take much for a rifle to make a big movement on a target.
Lastly, all the guys above are right about thick cross hairs. The better the scope, the finer the cross hairs, the brighterand cleaner the image looks.
Hope this helped.