I have a 10" contender bbl with just a weaver scope mount on it. the front of bbl is milled for what i would believe would be ipssc sight. with all of that said i have not been able to get the accuracy out of this bbl. doesn't seem to be anything wrong with it, just my hand loads don't seem to be cutting it. I origainally thought of rechambering to 30-30 but my local gunsmith said it was a crap shoot between a shooter and an expensive draw bar pin. Is my local guy right? what other common calibers can it be chambered to.