Recently I picked up a nice vintage Mossberg 46M(b) 22LR, and took it out to the range today.
It came without sights but with a vintage Weaver 29s scope (with a single post, no crosshairs). I think it is 1.5x or 2x magnification at most.
Overall it is a nice old gun and it fed, shot, and ejected without a hitch. I tried High Velocity (CCI Blazer), Standard Velocity (Aguila), and Subsonic (Remington).
I didn't keep the High Velocity target, but it was comparable to those below.
Subsonic seemed to group best (2" approx at 50 yards). The Aguila had some tighter groups but more vertical stringing. I think that with a more modern scope that I could see better through these groups would improve.
Overall a very fun gun to shoot. It might make a nice trainer for a vintage 1903 sniper clone. I am looking for a 42M also to compliment it.