Short Range AK ammo

[Caseless]

Has anyone tried this practice ammo? I wonder if it will cycle an AK or SKS.
I suspect they are corrosive, too.

http://www.ammoman.com/webstore_762x39.htm

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7.62X39 SHORT RANGE AMMO

[Bucc]

isn't ALL X39 short range?

I think I'd try that if I didn't have to buy a case of it to do it.