Hi all. New to this forum. I've been having a problem with a gen4 model 23 jamming/FTF with practice ammo Aguila and American Eagle 180grain FMJ. About 2 dozen jams in 300 rounds.This is first time a ever had a jamming problem with a glock(19, 21, 36.) I have no issues with Fed HST 180 which is my carry ammo in 40 or Herters 180 FMJ. All 155 and 135 grain FMJ and HP stuff shoots fine. I have cleaned and lubed the gun well. I left slide locked open for a couple of days. Both have helped but not cured the problem. Anybody else have this problem? Only 800 rounds thru gun thus far? Should I just stay away from those brands? Might it be the recoil/guiderod spring? This seems to be the main difference between my gen3 guns. Thanks for your help.