Is it possible to shoot a .40 S&W cartridge in a Glock 10mm without a major catastrophe?
This shooter actually thinks it is a good practice to do so.
Watch this video and make that decision for yourself.
Word of warning: always use the correct ammunition that the gun's manufacturer indicates is safe. Using the wrong ammunition can be dangerous and will void any warranty.
This shooter, however, feels that shooting .40 Smith and Wesson cartridges in a 10mm chambered Glock 20 is a good idea.
Firing ten rounds of Magtech .40 S&W from a Glock 20 chambered for 10mm nets no major catastrophes. In truth, the chamber pressures are lower on the .40 S&W cartridge over the 10mm and the .40 S&W is actually a short 10mm cartridge.
Would you do this in an emergency situation?