Got one of the first Lipsey's Shopkeepers out, got their adjustable-sighted version last year.
The one with sights will do at 25 yards what the Shopkeeper did at 15.
Re leading, I had one of the first 4.2 .22LR SPs.
Leaded up inside 300 rounds to the point Remington Target loads were keyholing at 25 yards, and I was removing lead from the grooves in strips.
Gun replaced by Ruger, second started doing same.
Turned out the factory was not cutting the cones right.
Discussions followed.
Engineers were telling my contact "We've ALWAYS done it that way, Single-Sixes & everything!" and "They're supposed to lead up at 300 rounds, perfectly normal."
Well...., no, it ain't normal & it ain't the way you cut cones on three Single-Sixes here spanning 35 years of production.
I provided a gauge # from Brownells that my gunsmith used to check, and which clearly showed pretty much no cone, so my contact could demonstrate to the engineers that they were wrong.
More discussions.
Oops.
Cones corrected thereafter.
I had my smith open mine up, quicker than sending a second sample back to Ruger.
Roughly 800 rounds now & no appreciable leading in it.
Sometimes you get a lemon, sometimes you get lemonade.
Mostly it's lemonade, but...
Denis