Will keep an eye out; an honest old set of diamond Magnas for an honest old M & P. Got 'er home and cleaned up some. The bore and chambers are perfect and lockup and endshake are good, too. About what I'd expect for a .38 that postdates the era when any hardware store in Appalachia would have old blackpowder, semismokeless or corrosive priming era .38 Specials.
You have to watch prewar guns hereabouts; sewerpipe bores, ringed bores and swollen cylinders are not unheard of in prewar Military and Polices and Colt Police Positives. A farmer would get the "for rifles only" .32-20 High Velocity and shoot it through his rifle and pistol. Would swell the cylinder on a .32-20 M&P, but by the 50s, most of the cheap .32-20 M92 Winchesters had been bought up and Magnumized and the old High Velocity ammo had been sold out of the Co-Ops, as had the old .38 Special.