For what it's worth, go to
http://www.leeprecision.com/html/HelpVideos/video.html and watch the video on how to properly setup the Lee pistol dies - you will EITHER crimp with the seating die (I do this on my .45ACP die set) OR you will omit the crimping on that die and run the factory crimp die. Set the dies according to the video and give it a shot. I have had my press/dies for awhile now and am about 500rds deep into reloading, but I went back and watched these videos and re-set the dies - no more problems.
I also found that I was flaring the case mouth just a wee bit too much. I now do the absolute minimum in order to get the bullet into the case.
It seems that when I'm shooting, the action of the gun will help the cartridge chamber correctly if it's a tight fit. Placing it into a case gauge may not do the same as the action, but I do understand the need for 100% reliability. I am only loading for range practice/target shooting, but plan on running 500rds shortly since I picked up 500 .45ACP 230gr Hornady FMJs for $50
Will store these for SHTF and will require 100% reliability.