Thinking about purchasing a 10mm glock 20 and using these double

>>29746402
The gun is chambered in 10mm, so you'd be buying the wrong caliber.

>>29746414
That's true, but it does work out. .40 S&W is comparable to 10mm short, like a gun chambered in 22LR firing 22 short or .357 in a .38. My concern is wearing out the .40 S&W chambered gun too fast.

>>29746434
At least get a conversion barrel. You don't want to wear down that lip at the end of the chamber that holds the 10mm case.

>My concern is wearing out the .40 S&W chambered gun too fast.
Literally a non-concern. Both guns use the same recoil spring in any case.

>>29746434
no, Semi autos do not work like that. revolvers do not rely on headspacing to fire a cartridge so that's why that it's ok. Also, all .22 LR derivatives have the same case length. This is not the case with a glock 20 or .40/10mm.

besides, just get the 10mm version.
http://www.doubletapammo.net/index.php?route=product/product&path=303_301&product_id=40

or buy a heavy duty .40 that can handle it, like a USP, or if you are a special snowflake, a s&w 610.

putting shorter cartridges in semi autos is how you ka boom

>>29746483
I thought that was just for necked cases, since pulling the case away from the chamber creates a huge gap where the neck of the case lacks support. I have seen people shoot .40 out of a Glock 20 with no issues.

>>29746457
Maybe a stiffer recoil spring? The bullet and neck diameters for 10mm and .40 S&W are literally the same... should lip wear even be a concern?

>>29746502
that's more a testament to the construction of the gun than the changeability of caliber. don't if you want to maximize you gun and hand life.

https://www.youtube.com/watch?v=lkJuu7rwNEc

http://www.thetruthaboutguns.com/2015/06/jeremy-s/40-in-a-10mm-glock/
Might work.

Why the fuck would you buy a G20 only to buy boutique .40 that shoots the same as 10mm plinking ammo? Seriously I need to know what the hell the logic is here because it has nothing to do with IF it'll work or not.

>>29746506
there's an 1/8" gap, i wouldn't recommend it

>>29746614
it works, it's just a can vs should argument

>>29746642
this 100%