I have been traveling this week and spoke to the owner of a small gun shop near St. Louis this morning. He showed me a Gen 5 Glock 17 he had for sale and cautioned against running factory 147g FMJ ammunition through it without first doing some testing. He told me a shooter had difficulty pulling the slide to the rear to show clear after a stage at a pistol match and the projectile was pulled from the case. He told me the 147g factory cartridges were tried in other Gen 5 Glock 17s and some had the same issue. It was concluded the "chamber was cut tight." The consensus among competitors was to shoot ammunition with projectiles 135g and lighter.
It sounds like the leade was cut shorter on this particular Gen 5 Glock 17 than the leade on Gen 4s are normally cut. I view that as an advantage when loading accurate cartridges used in competition. I am going to pick up a Gen 5 Glock 17 before Glock makes any changes.
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