I am considering reloading. I ordered a Lyman Reloading Manual. I will be reloading 40S&W and 9MM for my Glock 27 and Glock 19. I was talkin with a guy how told me that you cannot reload ammo fired from a Glock because the Glock chamber is made larger then normal. So, when the charge goes off the case expands to a point where you cannot get the case back to specs during the reloading process. Bust this myth, if it is a myth. If this is true, that means only using new brass and never reloading fired brass, right?? Remember, I no nothing about reloading. I am still waiting for my reloading manual to arrive. Bust this myth, please. Comments please!