Actually, no, I didn't do anything to the 45. This pistol has no external safety like the Browning. It has the backstrap safety and the trigger, bang.
So, anything, trigger finger etc. that can brush against the trigger sufficiently to cause the trigger to disengage, well, bang. The inertia of the slide soming to a stop can cause the pistol to abruptly stop and the opposite and equal reaction is the trigger can contact anything, including your finger or edge of it, and sufficiently press the trigger to cause a dischange, intentional or otherwise. I have now learned a very important lesson concerning this pistol and carry it everyday but that moment does come to mind and unlike the Browning, I only carry it with a full mag and empty chamber, no surprises. The Browning I carry fully loaded and ready to go but it has the external safety which I like much better.
Oh, I've carried my Browning for the past 20 yrs CCW style so it isn't a lack of training if you was thinking of going down that road. Maybe being unfamiliar from a muscle memory standpoint with the 45, yes, I can agree with that but the original post has been answered.