I went through the same thing you're doing and decided on the 597 LS HB because the 22 mag just isn't made in the semi-auto as they are in the bolt action. I got mine a few years ago and if I were to do it over, I would buy a bolt gun.
I like my Remington, but I've also done a few things to make it better. May I suggest you read a lot of threads on the 597 over at Rimfirecentral site.
The gun can be fussy as many folks have found if ya read the threads, mostly though it seems to be the 22lr more than the magnum.
The magazines hold 8 mag rounds, mine shoots the Rem premier the best with Win silver box next, I've never been able to fast fire the whole 8 without a jam or a fail to eject the whole way. But realistically.........why does one need to fire 8 ? so I only load 5 and have no problems. Can't answer why it does it.
I also put in a custom hammer/trigger that seemed to help my groups. And I recently purchased a Boyds stock at a reduced cost,,like $23,, and sanded the pistol grip area down to fit my hand better and then refinished with Tru-Oil, it came out great and now is a bit more comfy to shoot.
My scope is a Nikon Pro Staff 2-7 x32 shotgun scope with a paralax of 75 yards and I believe it is the perfect scope for the 22 mag.
If you really want the semi auto 22 mag, Remington is the only one I found, maybe someone else can add to this or lead you to another brand that I overlooked.
It's a nice gun, ya just need to be patient with a few things I guess. Hope this helps.