A Mec 600 Jr would be better for the 3" shells. You can't run buck shot through any shotgun shell reloader that I know of.
I have a Mec Grabber that I reload all of my Trap, Skeet and Sporting Clays shells on but I use a Mec 600 Jr for the 2-3/4" mag and 3" magnum loads on.
All of my coyote and goose loads that I reload I put the shot in the shell by hand, I don't use the shot bar because the pellets are too big.
