DXS GOLD!!! Marbalizers, although they don't break enough.
If you don't match the bore you'll have a bad day.
When you put fresh DXS gold through this thing, consistant one shot kills are a possibility up to 30 yards. I've even gotten them up to 50 yards, but that was pure luck of no wind and having the perfect paintball loaded. Keep her clean, and feed her fresh dxs gold and you'll be delivering headshots at 20 yards all day long.