I have several H&R pistols, all in the 900 series and HV ammo works fine. They are accurate enough with it, not that I worry so much about that. Only the older early ones like the 22 specials etc may not like it, though mine I inherited does fine with it as well. Probably any that are the 3 number series are fine with it safety wise.
H&Rs have been creeping up in value over the years especially the Sportsman /999. The Sidekicks and other fancier ones are going around the $400 range now depending on condition.
If the grips are not gouged too deep, they can be refinished nicely, though value wise they like the original finish, so depends on what want to do with it. Ebay often has grips and parts for H&Rs.
They are great camping plinking pistols, despite an often heavy rough trigger.