Definitely look at the Falcon scopes, check out cyberk's web site.
www . allengunworks.com
I think the highest magnification you get with them is 18 but the price is tough to beat. I've got two now, no complaints.
If you don't reload, and want to shoot beyond 500, look for Federal GMM with 69g SMK's, there may be others like Black Hills but not easy to find. Under 500 yards, Federal also makes Premium ammo with 52g HPBT, a lot of other ammo will work, probably even the 55g FMJ American Eagle.