Do you NEED more than 5 ? IMO, NO. If you can't hit your target with 5.....you aren't going to do it with 6......or 10......or 17, for that matter. I'm sure that for the vast majority (probably 98 %) of SD situations, the event is over so fast that 5 will definitely do.
For me, for daily CC situations......5 will do (or 6,7,8 - whatever, depending on capacity). In other words, ONE full load. However, for some sort of extended excursion, away from my source of "resupply"....I certainly would/will carry a reload (or several).....though the reloads might stay in the car or luggage, etc. unless/ until needed.
For me, for daily CC situations......5 will do (or 6,7,8 - whatever, depending on capacity). In other words, ONE full load. However, for some sort of extended excursion, away from my source of "resupply"....I certainly would/will carry a reload (or several).....though the reloads might stay in the car or luggage, etc. unless/ until needed.