i think with the right ammo your mossy 500 might be able to do 150 yards. i would spend the money on getting the barrel ported and a sims recoil pad installed if the kick is bothering you. mossberg does barrel porting pretty cheap and i believe sims sells a pre-fit recoil pad. http://www.mossberg.com/content.asp?ID=496&section=access have you tried the honady sst slugs? http://www.midwayusa.com/eproductpag...eitemid=423385