10mm wildcat?

[mljdeckard]

As I learn about cartridges and their origins, I am sometimes surprised that it takes as long as it does to invent new ones. As the 10mm is shortened to the .40, the .40 is necked-down to the .357 SIG, and the .45 is necked down to a .400 Corbon,

.....why hasn't anyone necked a 10mm down to a .355 cal bullet? Is it that it's just too high-pressure and the components can't handle it, or has somebody done it and it was too wild for any practical purpose? I mean, it seems like while a reason to experiment with these things is always good, it's hardly REQUIRED.

Call it the .357 "are you kidding me?" magnum or something.

 

[General Geoff]

This cartridge does exist; it's called the 9x25 Dillon. Invented in 1988, it predates .40S&W.

 

[mljdeckard]

can you replace a 10mm with a different barrel to shoot it, or is it more involved than that?

 

[General Geoff]

Yes; the standardized pressure for 9x25 Dillon is slightly lower than 10mm Auto, so a drop-in conversion barrel should work just fine.

9x25 can propel a 115gr bullet at ~1800fps, or a 147gr bullet at ~1500. Makes .357 Sig look pretty dull, eh?

 

[mljdeckard]

and can you form the brass from 10mm brass?

 

[General Geoff]

Yes.

 

[Dave T]

Just be sure you have really, really good hearing protection. (not kidding)

Dave

 

[Simonovsdog]

You can buy the ammo, and drop in Glock M20 barrel at doubletapammo.com.

 

[sarduy]

hehehe that sound like fun!
then get a .22lr and .50GI conversion and you're all set.

 

[Dr_2_B]

this is news to me, but you've piqued my interest

 

[mljdeckard]

I read a little bit about it, the main idea isn't to squeeze more velocity out of the 9mm, but rather to generate more pressure for guns with compensators, to make more downforce. Still sounds like a fireball though.

 

[glocktoys]

wow i need one of those for my glock 20..