All recent factory manufacture 32-20 with a lead or soft point is fine.
The rifle only loads looked like full metal jackets with a tiny hollowpoint
on the nose and was last made in the 1960s. The only pistol that could fire them safely was the Colt SAA. The load you mentioned would be excellent. Handloading for this round really brings out a lot of potential. Modern 32-20 ammo is about like 32 S&W Long in performance- 100 gr slug at 750fps.