I just purchased a Glock 23 Gen 4 yesterday and I just noticed that when I load a magazine up with 13 rounds, which is how many it claims to hold, it takes a bit of muscle to get the magazine to lock into the gun, but when I take just 1 round out to make it 12 it goes in fine. I tried with 3 different magazines and am using Hornady Critical Duty .40 S&W ammo and have also noticed just getting that 13th round into the magazine requires a bit of muscle as well.
Anyone have an idea how to fix this issue?
-Garret