My favorite is 22.5 grains of Solo 1000, W209, Rem TGT wad with 24 grams of shot in a Remington Game load hull, it is just over 1400 fps at this altitude (3700') and 7900 psi, take off from 40-50 fps at sea level.
Personally, I don't like fast, light shells in a straight walled hull, but is just an opinion, and use any of the proper propellants with any fitting wad in any case with any primer of those listed on any website------and they will still break a target
And you didn't ask this either, but I would go for the grabber again and make a mountain of reloads for the cost difference, there will be NO
difference in shell performance with it.
The best, fastest, lowest pressure International load I ever tested was using PB powder, but it isn't in a book so I won't bother you with it