Well another question?? I suddenly have a grand nephew, that wants to hunt deer with his Dad, and the area is they hunt is slug only. So I was going through my loading books looking for some thing that wouldn't bust the kid up and some place way back in my foggy memory I thought about loading a .562 RB in a 20 ga. As I recall it was in an early I think Speer manual using a WW20 shot cup,, However I cant find that book or any others using that combo, they also had a listing for a .575 mini hollow base ball. Im thinking they used IMR 4756 or Unique but I cant remember. Anybody have any thing on loading anything like this as I remember it was a heavy light load,, if you can under stand, not a lot of recoil as compared to the factory loaded slugs,, We loaded a bunch way back in the day and for a 50 yard smooth bore they shot ok , but Im thinking more of recoil for this young lad, all of 50 pounds soaking wet