We test winches for hire, and per Ron's post yes they are all rated for capacity on the first lay. The only exceptions are marine mooring winches and tuggers. They just have a maximum line pull rating. THe mechanics of the deuce winch are underrated, but the limiting factor is the rope. Winch SF guidelines are for a 2:1 and the 1/2" rope meets that.
Electric winches such as Warn, Mile Marker, and others are winches for show. Most (not all) will not make rated pull, most will failel, and all will overheat or loose gearing long before you make a pull of any length. (Read like 25 feet or so.) The best you can depend on from one of these show winches is 1/2 the rating and that is being generous.
Like Recovery posted, the correct shear pins are tough, at roughly 800RPM the winch should stall the engine before it shears. But screw with the clutch or bump the throttle and snap.