so i shot my greyhawk for the first time today. i shot from 35yrds. and after 10 shots i finally got it shooting on my target! it grouped ok but i bottomed out the rear sight?! i was shooting hornady .490 balls, tradition .015 wonderlubed patches, and i began shooting at 70gr. of pyrodex rs select but got my best groups at 90grs. so has anyone experienced this with round balls? i tried some hornady great plains 410gr. bullets BUT they were so hard to start that i only shot 2. they actually shot good but the nose was pretty deformed after using my ball starter on them.