I have never ridden the thumb safety with my strong side thumb when shooting model 1911s and I have never accidentally deployed the safety when shooting.
If I try to ride the thumb safety on my particular model 1911 pistols, I do not always depress the grip safety sufficiently even if it has a "memory bump". That produces a failure to go bang that had actually happened to me on multiple occasions as opposed to some theoretical failure to go bang resulting from not riding the safety lever.
If I try to ride the thumb safety on my particular model 1911 pistols, I do not always depress the grip safety sufficiently even if it has a "memory bump". That produces a failure to go bang that had actually happened to me on multiple occasions as opposed to some theoretical failure to go bang resulting from not riding the safety lever.