Correct me if I'm wrong, anyone who has done this
ZeSpectre said:
-That you can shoot .40 S&W in a 10mm autoloader if you want a cheaper practice load
I have never done it (and never will), but I believe you can fire .40 S&W in a 10mm. (The extractor often-but not always- can hold the cartridge against the breechface and firing pin well enough to achieve ignition of the primer.) With these caveats.
It will not be cheaper once you blow up your gun and pay your medical bills.
It will not be worthwhile when you consider the crud left in your chamber.
It will not likely have enough recoil force to cycle the action, resulting in a frustrating percentage of jams.
I also believe you can do it safely with the same 10mm slide, but a 40 S&W barrel/chamber, appropriate recoil spring and magazine(s) to feed the .40S&W.
Just because you CAN do a thing does not mean you SHOULD do a thing.
With a bit of luck you can run a diesel engine on gasoline, too. For a little while, anyway. But don't try to explain it to the fire department.
Remember, only believe half of what you see and one quarter of what you hear. That goes double for what you get from the internet. Even this post. Maybe especially this post.
Do your own independent, confirming research when ANYONE gives you new facts on the web.
Apparently, the caveat applies to gun/sporting goods stores, too.
Also remember, even the idiotic stuff might have a kernel of truth buried in there somewhere.
Lost Sheep