They are nice guns. Tight and slick pistols. Buddy has one. He asked me what kind of .22 semi auto pistol he should get and I said a Ruger MK something. Any of the series were pretty good I told him. He bought a HS instead.
It has NEVER run right. He bought an aftermarket mag (red follower) and the tool to adjust the lips. We couldn’t get it to work with either mag. The original or the new one. We made slight adjustments to the mag as per instructions. No good either way.
We tried a bunch of different ammo through it was well. He would give me partial boxes of ammo that didn’t work. They worked fine in my MK2 however.
We spent many frustrating range sessions trying to get it to work. It never did. He even said he wanted to leave it with me to work on it (I’ve worked on quite a few of his guns before and since) I told him I didn’t want to give it my time. Too difficult.
Many years ago I was shooting with a friend at his farm. He had brought a HS Citation? Anyway it had a 1911 angle grip. It would not feed. While he shot something else, I carefully examined how it fed. Yes I had it pointed constantly in a safe direction, but it never fired as searage was good and I was careful to keep my finger below the trigger.
These feed by the cartridge rising high and the bullet gets a very nearly straight run into the chamber. I kept watching as I would ease the slide forward. If the round didn't run true, I would try slightly changing a feed lip angle. Then I would again ease the slide forward watching the angle of the round. Did this over and over so many times watching to see what effect each tweak had on the feed angle.
After at least 45 minutes and maybe even an hour or more, I finally got it! Every round fed true and the gun ran perfectly. IIRC that was an original HS mag. I don't know about the other makes, but the metal condition and quality are even more important than say, for a 1911 mag.
You have to have a "good eye", a lot of patience, and a good memory so you don't repeat what didn't work. That last is all too easy to do.
Do not use pliers to grip the lips. You will damage them. I suppose you could tape the piler faces but I didn't have any tape. Instead I would push a lip inward against the edge of a wooden bench or use CLOSED needlenose to gently move outward. Of course you could use other tools/instruments, but that was all I had.
Another consideration: If you're really not good at this sort of thing, be man enough to admit it and go find somebody who is. I have made the mistake of not admitting such in too many areas of life.