Can the old 1970s Charter Arms .22 revolvers safely handle modern ammo like CCI Mini-Mag, Velocitor, and Stinger?
Yes, it
can handle those rounds. But does it
like them?
I have found that in guns from Heritage Rough Riders, to various new semi-autos from Browning, Walther, and Taurus to my Ruger 10-22 Takedown, CCI standard velocity is more accurate than any of the high, or hyper velocity offerings.
Give the hotter stuff a try, but also compare them to standard velocity foe accuracy.
If your concern is to get a little more umph for SD use in 22 rimfire, you might get some, but you will never turn a 22 into a 38. Not in performance, or more importantly in
reliability. Even the best rimfire cartridges are more prone to missfires than any centerfire. Maybe they are 90-95% reliable, but I wouldn't want that other 5% to show up at the worst possible time.