Ah, My Good Perfesser
Please allow me the opportunity too elucidate. USFA followed Uberti, who sort of followed Colt, who, because of lack of adequate metallurgy, used really heavy springs. Properly timed, the Bolt should drop into the lead. Not into the notch. The bolt should slide in the lead and drop into the notch. With a much heavier than necessary Trigger/Bolt spring, and the Bolt dropping late (onto the edge of the notch), you get peened slot sides. Messing with the bolt timing will also result in the bolt dragging on the cylinder. As will failure to full cock from half cock.
To me, the guns exhibit having been "adjusted" post set-up by Long Hunter shooting Supply. By some ham fisted near do well with little or no knowledge of how to time a Single Action. Now that they are buggered up, time to dump them off on someone else.
For the asking price for the USFAs, one could source 4 . . . . yes Agnes, that's FOUR Pietta GW IIs. And have much more serviceable guns. For that and another reason, I refused to shell out for High End SA's. Spending that much and still needing someone (like me) to make them User Friend seemed Oxymoron. I never refused to separate folks from "their" money to perform said service however. You see, I am a capitalist. P.T. Barnum had a saying . . . . . . . . . . . Burma Shave