I'm curious - are the slide rails on the frame straight or do they have sand cuts?
I'll have to check on that, but my recollection (almost certain) is that they are straight with no sand cuts.
There's a true story about the 220 that bears repeating. Years ago, in the mid 80's, I was at my buddies cabin and had my 220 with me. A friend of mine, who had never fired a gun in his life, asked to shoot it. We were standing on the porch of a cabin and he chose a target, a cinder block, that was down a hill and over the edge of a pond, at least 100 to 120 yards away, if not more. His first shot cracked the block into two. The next three or four shots, called by the shooter, were direct hits on the remaining chunks. One hit could have been luck. Even two, but there was no way it was all luck.
A month later the guy came back with a brand new Ruger P85 to try out, and he couldn't hit the broad side of the barn with it. That's nothing against the P85, although some of those early ones weren't exactly tack drivers, but it showed to me the inherent accuracy of the 220 with a brand new shooter, bascially a blank slate, doing so well with one gun and so poorly with another.
It also shows that after that lesson how downright stupid I was to sell/trade that gun. I'm hoping this one gets close.