Not without a replacement barrel. The shorter cartridge wouldn’t headspace properly. However, companies make aftermarket barrels.
For Glocks, for instance, for under $100 you can get a drop in barrel that takes about 10 seconds to install. They make:
- .40 to 9mm barrels (very popular to let people practice with cheaper 9mm in their .40s...only other thing you need is 9mm mags)
- .40 to .357 SIG barrels
- 10mm to .40 barrels
- 10mm to 9x25 Dillon barrels
I’ve been torn for a couple months now between a Glock 27 and 29—the subcompact .40 and 10mm. With the 27 I could grab a barrel and 1000 rounds of cheap 9mm. But I really want to have 10 for my defensive rounds. I figured if you can chamber 9mm in a .40 and .40 in a 10mm you oughta be able to shoot 9mm from a 10mm, but I haven’t seen a barrel for that.
Thanks for your reply, and good luck on your Glock quest. The 10mm does look like an awesome defense cartridge.
[Early in my roundup of .40 caliber shopping, I got frustrated over sold-out inventories and considered ordering Glock’s .40 subbie sight unseen. I’m glad I waited until a gunshow to comparison shop! Hated the boxy feel of the G27’s grip soon as I touched one, happily bought a Taurus Millineum that custom fit my hand.]
I like the idea of being able to swap uppers/barrels for cheaper plinking, but couldn’t make myself commit. I’m not a gunsmith, don’t trust myself or the manufacturer to get it right every time I try to swap. Besides, it’s often cheaper to buy an entire plinking gun than a plinking upper. LOL, that’s how I ended up with a whole 10/22 instead of a conversion for my AR.
But yeah, you’d think Glock would have a 10mm-to-9mm conversion readily available.