Joel6180,
Here is something that I posted on the forum about 8 years ago. Hope it helps.
"On some revolvers it is unavoidable, due to mechanical design. Smith & Wessons and Rugers for example. Simple mechanics of the gun cause the bolt to rise well before the cylinder is in battery, thus causing the bolt "drag marks" on the cylinder.
Properly timed revolvers of the Colt SAA design should not do this. The design is such that the bolt rises just before the locking notch comes into place as the cylinder turns. This is not to say that it won't happen. With age ( use and wear) some guns will get out of time and the bolt will rise early, causing drag marks. USFA guns come from the factory properly timed and with proper maintenance you will not have this problem with them.
So... why do you see new SAA's with the drag marks? Improper (read uneducated) handling in most cases. Whenever you bring the hammer back to the half cock position, ALWAYS bring it to a full cock before lowering the hammer (and always lower it on an empty chamber). At half cock, the bolt is lowered and the cylinder is out of battery. When you drop the hammer from a half cock position, the bolt rises but the cylinder is still out of battery and the bolt rests against the cylinder between the locking notches. The cylinder is free to turn and when it does the bolt scratches it. This sin is most often committed while loading. Proper loading procedure - and I am sure you already know this - is to bring the gun to half cock to free the cylinder. Load one, skip one, load four, bring the hammer to full cock and then lower it on the empty chamber. Do this and you shouldn't have any problems with those drag marks."