I have several good quality fixed power rifle scopes and was wondering if these would work on a Xcal. Crossbow.

Probably depends on which bow you got. There are guys that use them w/ no problems, but the Emax is tough on everything, serving and scopes.
You might want to consider a V-Zone or L-zone. They put you spot on from 10 to 50 yds. I won't shoot deer past 35 even w/ Emax, but have no qualms about gigging a yote or rabbit at 50. W/ a single aim point like xhairs in a rifle scope, there's alot to remember if you want to try longer range shots on non deer targets. Excal trading post usually has good deals on V-zones, guys are updating to the lit reticule L-zone. Best deal on both new is still bowhunterssuperstore.

The Lumizone is a really nice scope. It doesn't have choice of red or green like the Tenpoint one but the picture is better IMHO when looking through it. I like the graduated lines and the chevron aim points are nice too.

Yes rifle scopes will work fine. I have a Bushnell 1.5x6 on my Exocet 200![]