Hi all,
jcwit, he said they were once fired brass so even though he doesn't shoot a Glock, it will still be a problem.
howelljeffrey, you may need the Redding G-RX die to size all the way down to the base of the case ($37 from MidwayUSA) or I found the shell holder top is thinner than the progressive/turret shell plate, thus allowing you to size further down the case. If you have access to a single stage press, you can try your die/case to see if that will fix your problem. If using your die in a single stage press works, you may be able to find a new/used single stage press for a decent price (I find them for $25-$35 at gun shows/classified ads).
Here's one thread that talked about Glocked cases (less supported Glock barrel chambers bulging the base of cases).
http://www.thehighroad.org/showthread.php?p=6212826#post6212826
Here's a repost from another thread that may be pertinent to your problem:
"For Lee reloaders,
I found sizing some 9mm brass on Lee Pro 1000 using shell plate #19 quite do not size all the way down to the bottom of the case and would fail the case gauge. But when I size the same case using the standard shell holder #19 in a single stage press, case is sized all the way down and pass the case gauge.
Upon closer examination of the shell plate and shell holder, I found shell plate top thicker than the shell holder, which explained the above.
If you have this problem using progressive press/shell plate and already have a single stage press, you can mount the sizing die on the single stage press and see if this improves sizing (most reloaders I shoot with have found this addresses the sizing issue). The Redding G-RX die is $37 from MidwayUSA and AFAIK, it is only available in 40S&W.
I switched to single stage and progressive press setup and size/deprime on the single stage press. Since the switchover, I have found only a handful of cases that failed the gauge test."
http://www.thehighroad.org/showthread.php?p=6223734#post6223734