[ctdonath2]

May not take much change in seating. +P[+] ammo (presumably used for serious Los Alamos type security) is already stuffed to the gills, so slightly deeper seating may have a significant effect.

[LeGrande]

Are there any charts on compression effects? My experience has been that too little or two much compression is detrimental to the bullets performance.

Do Glocks have a lower margin of error on how much pressure they will withstand compared to other handguns?

If all it takes is chambering a round a dozen times, I would think that this would be a much more widespread problem. One incident probably doesn't teach us much. We need a couple of hundred examples.