I had to make a special magwell adapter for CZ-24 subgun magazine because I could not get the 22 Reed Express rounds to work out of a PPS-43 magazine. the short mag in the picture is a mag I use at the range. The picture below is the full length CZ-24 mag with the 22 Reed Express ammo in it.
I should be able to get to the range this coming weekend and try the sabots. I have two different loads -- one uses the short Hornady 35gr 22 caliber bullet and the other uses the Sierra 55gr 22 caliber bullet. I actually hope they both work well. I'm not expecting a target rifle, just something that can be used as a nice plinker.
Edit to add: I was just thinking about your Rommy AK 47 and was wondering if you had any type of muzzle brake or flash hider on it -- even one of those simple angled ones? Any type of muzzle device can have a really bad affect on the sabots. The sabot opens right at the muzzle and if there is anything there it can screw with the accuracy. I decided to use my DI operated Tok carbine and had to remove the flash hider and make a thread protector. I know that some of the Rommy AK's have these simple angled muzzle devices but the fingers on the sabot may be able to touch it as it exits the muzzle.