That Rossi is interesting. I don't need to be subsonic for critter control so I might be better off with jacketed 125 gr bullets at 2000 fps or 158 gr at 1700 fps if they will work. Should be effective for deer out to 125 yards as well.
My plinking/fun load is a 125 gr cast bullet in .38 Spl cases. Wonder if it will work at 1000 fps with that twist?