I picked up a used .45 Convertible Blackhawk ('87 ish manufacture) 4 5/8 and it rapidly displaced my M&P as my primary CCW. (although the M&P still rides along as my BUG until I pick up a second Blackhawk and a double- shoulder rig)
Draws well, with both hands, great weight, wonderfully accurate, fits snugly against my rib cage in a vertical Shoulder rig, and will eat just about any non-suicidal load I care to feed it.
As others have said, not every Ruger can eat "Ruger Only" loads, and I rarely surpass a moderate +p in my handloads, although those commercial Buffalo Bore 300 grain wrist-snappers have tempted me once or twice.
It is fun to keep a few "unpleasant" rounds in reserve, I don't sneak them in on friends,(That's a Jerk move in my book) but a few are "brave souls" who will attempt them after they see me launch a few. Really does show you who knows how to control recoil.
Here's the shot from the shop on the day I picked it up, Great plum coloring here and there, but most visible on the loading gate... It may be considered a flaw, but it's just plain beautiful to me... wish the gun was ALL plum. Only modification I've done is curving the spring slightly (Not big on just unhooking one leg) Dropped the trigger pull just a smidge, and it's perfect.
Grips are Sambar Stag, and it's not something I would have invested in on my own, but came pre-installed by the prior owner. (Whom I see once in a while in the Shop I usually frequent, so if he'd sold me a bad gun, he would have gotten an earful)
Reloading , (or being stinking rich) is Mandatory with big bores however, If you aren't already that is.