bluesman said:
I checked the rounds and the primer was clearly dimpled.
what did the dimple look like? was it as deep as the dimple on the critical defense rounds that did go off? from what i know ammo-related duds can be caused by
1) improperly seated primers. here the impact from the pin causes the primer to move forward, stealing energy that should have caused the pin to indent the primer. in this case the dimple tend to be smaller and a second strike fires the primer
2) incorrect primer type. e.g. small rifle primers, in particular military surplus stuff that was intended for free-floating pins. these can be so hard that a little pistol firing pin cant touch them off. the dimple should be smaller than e.g. the dimple in wwb stuff
3) primer that have been destroyed by improper exposure. you have not been cleaning your gun with wd-40 by any chance? i dont know how common this is but i've heard horror stories of pistols that destroys carry ammo over time because traces of wd-40 works its way into the primers rendering then useless. in this case one would of course expect normal dimples despite the failure to fire
either way it sounds like a really uncool experience. i'd strongly consider switching carry ammo.