The ramp on a glock is a bit more opened up than on a normal semiauto, this assists in jam free operation.
However removing the extra material at the mouth of the chamber
leaves some of the bullet casing unsuported by the chamber.
This is ok for factory loads but may result in the unsupported section of the bullrt case "blowing out" or rupturing when using hot handloaded ammo.
I am uncertain if P+ ammo would result in the same situation.
The glocks a fine weapon but is susceptable to this condition. Ive seen it happen
Have and do shoot +p here. No problems. As long as hand loads are recipied and built right, headspaced, etc., there should be no problems.
ps-I've read the Glockkb faq on gunzone as well prior to buying my first handgun. After enough poking around, I came to the conclusion that for one reason or another any gun can kb made by *any* manufacturor. Struck me more as anti-Gl*ck crowd scare tactics after a while. I've still yet to talk to *one* shooter or see *one* incident of a kb on a Glock of any model.