No need to baby that revolver jt3.
You can shoot any 45 colt ammo in it. The limitation is your comfort level and to that end I suggest a proper fitting set of grips that fit YOUR hand.
Some specialty ammo is labeled RUGER ONLY, so believe it and don't use THAT (Buffalo Bore, Core-Bon) ammo, but otherwise you're OK.
Try some 255g cast SWC/RNFP @ 900fps and see what you think. Enough power to end anything that breathes, not harsh on the recoil.