Rod WMG and all,
I don't remember if I responded to the first post concerning Winchester primer failures. I too have had primers fail to detonate. When these rounds were re-installed, so to speak, the ammo fired. (hit twice by the firing pin) The primers do behave differently with various pistols. I almost never had a problem when shooting my Springfield 1911, my browning BDM fair, S&W Model 19 many problems, a borrowed HK .45 was an absolutely miserable experience.
I also e-mailed Winchester a couple of weeks ago. I have not received any response from them and do not expect one. I usually buy primers in a flat of 5000. When the primers started acting up, I picked up 1000 from a different store for comparison. These acted up also. It may be time to switch to Federal or CCI.
Tucson, Arizona territory