My Ruger American .22lr struggles to group a 10rnd mag better than 3/4"(20mm) at it's 50yd zero with any ammo, although 1"(25mm) is easy enough.
The rapid .25 will shoot a 12rnd mag in 3/8"-1/2"(10-12mm) ragged single hole groups as fast as I can re-cock & pull the trigger at it's 42yd zero.
I suspect a fair bit is of course that the rimfire barrel changes temp as more shots go through it.

lensman57, there has to be cut off at some point & someone is always going to say it's in the wrong place
At 42fpe with a 25gn pellet I suspect mine is easily lethal at 50-60yds, at 20-25fpe they're probably still lethal at 25yds, yes powder is much more powerful, but as I say the limit has to be somewhere.