A mate had one in 222, way back. He bought it second hand from A-Mart Allsports at Slacks Creek, those of you who can remember a free Australia.
He used a Lee Loader and PMC 50gn projectiles. The damn thing, even with bullets that wobbled as you rolled the loaded cartridges along the table, shot one-hole groups. We were amazed.
I think it was a combination of a completely straight aligned action, and the cartridge itself being a freak design.
It was way back when I was culling pigs with a Garand 30-06, he'd come out and pop them between the eyes with this tiny beauty.
Makes me laugh at all these new marketing-in-action whizzbangs nowadays, that promise to make up for every of man's failings.