Mr. Moore, the gun is designed to reliably feed from a full stroke, not a short stroke, as the round's nose hits the ramp, is forced forward and upward, generally the nose of the round striking the upper roof of the chamber, and nosing over the breakover clearance at bottom rear of chamber/top of ramp, and lessening the force/momemtum of slide can cause a gun to fail to fully feed a round against all this resistance....just like limp-wristing can do....admittedly, it SHOULD also feed from the slide stop being depressed, but that will not always be the case due to many variables, ranging from how heavily fouled the weapon is, to variations in ammunition, to how much strength is stored in springs. As for it being "kosher", even the 1940 Army Field Manual mentioned depressing the slide stop to chamber from an open slide....it just may not be best to do so depending on other variables....