I had two of the things, Charter Arms vintage, sorry. Recently sold one of 'em to my SIL cause he wanted it. They're about 1" at 25 yards accurate (don't set the world on fire, but good enough for woods survival hunting), have a CRAPPY trigger that can't easily be improved because of the way it's designed, but do float if the issue stock is used, are light, come apart and go together easily, and are handy as a backpacker's insurance or canoer's/kayaker's insurance gun. I bought mine originally because it was so easy to take on motorcycle trips.
If it jams, work on the feed ramp built in to the magazine, bend it out or in until it's feeding reliably. I've also read to slightly bevel the chamber mouth if necessary, though I didn't have to do that on either gun.
I still have an old Charter Explorer 2 pistol, built on the AR7. Have a 6 and 8" barrel for it. I don't shoot it much. It's about as accurate as the rifle and has the same crappy trigger. I just bought it because it was cheap, 70 bucks new. It's at least reliable. I've had worse, have worse .22 handguns from the past. I also own MUCH better stuff, so I hardly ever shoot the thing. It is kinda cool in a Mauser broomhandle sort of way to look at.
The design of the gun is the same in the Henry and the main gripe I have with it is the trigger. It CANNOT be improved because of the way it's designed. I'd have to show you by taking the side plate off, hard to describe, but trust me, I bought a half dozen triggers (cheap) and screwed 'em all up trying. One actually turned the thing into a full auto....OOOPS.
The Charters are NOT that bad. Some have had problems, but if you have half a yen for things mechanical, they're so simple, they're easy to figure out and DIY on. The number one reason for jams is the magazine ramp angle. The feed ramp is on the magazine. That is easily fixed with a pair of needle nose (Leatherman) and a little experimenting.