I haven't tried factory sabots in mine (M835 Mossberg 24" rifled tube), just some preliminary round ball loads that made a 1 1/2" group at about 30 yards offhand with open sights and some 1 ounce 3" high vel. 1,790fps? WW foster slugs that grouped just about identically and on top of the bead the way the sight was already set. Those kicked pretty good in that gun - I was surprised at the recoil. Didn't expect that much punch.

I have both Hodgdon's Longshot and AA's Steel, but still haven't gotten around to buying a roll crimp tool to assemble some high vel RB loads. At some point, I will and of course, relay that info here at NitroExpress. I could borrow my brother's roll crimper and make my own - on his lathe. Location of the roll pins should be easy enough.