Apparently even the RAR .22 Magnums are still somewhat bound by the tendencies of all .22 Magnums. Though will note that among the .22 Magnums I've owned before was a CZ, purchased because I'd had such great luck with CZ's in .22 Long Rifle and both the .17 Mach 2 and HMR. The .22 Magnum shot well with some loads, but not spectacularly, so went down the road.
I did e-mail a contact at Ruger, asking about why my RAR .22 Magnum shoots better than most. His quick answer was, "Luck?" But he also said he'd ask some questions and get back to me.
