I've been carrying a Tactical 5.0 for a few years now. It also serves double duty, as my Limited gun. Dawson relayed the same thing, as far as the .40 reliability over the .45, which made the decision easy. I carry tuned 140mm mags (@ 20+1), with Dawson springs & followers, that stay loaded. I replace my mag springs roughly every 6 mos and haven't experienced any reliability issues.