If you can wait a few days I'll report back on what mine is like, SWMBO has given me a verbal stamp on a gun day on sunday so my plan is to assemble and test my 6M/Hy-Score as its somewhere inbetween the 2 you have.
I've been using RWS Gecos to practice with in the 24D, off a bench they are accurate enough at 6 yards, though even then I still get 1 that appears to tumble or a flier occasionally, I did think this maybe because they are only 7gr comming out a rifle thats doing bang on 5.9fpe, maybe a heavier pellet maybe the order of the day, the shop I use regularly had kugelmiesters in but only in 4.49 pistol weight and I really wanted to stick to 4.5s as that is what 'classics' tended to be fed "back in the day" so didn't purchase any . my other local gun shop didn't even stock wad-cutters of any size or calibre though its a typical "we sell proper guns, airguns are just something we 'have' to stock" tweed and springer spaniel type shop