Been there but with having to use nondominant hand, before RDS days. Glock 19 with a 15 round mag (in TX), OWB at 3:00 o'clock with edges so you could rack on it. One spare mag on the same side as gun, in back of it. Thus, could put empty gun in holster, get mag, put in holstered gun, use slide release.
NPE or dress days - 642 in pocket, reload - forget it in real time. Still carried a speed strip. Today, it would be my G26, same set up.
I could shoot decently with my nondominant hand. Took LFI-1 Stress fire as I was scheduled and did OK.