...sessions, the JSB Heavies have been very accurate out to 100 yards. If you're into slugs - the 55 grain Neilson Slugs performs as good as the JSB Heavies. I'm using an LCS SK-19: * JSB Heavies @ 880 - 890. * Predator Polymags @ 880 - 890. * 55 gr Neilson Slugs @ 840 - 850.