loading blanks

[Parashooter]

Factory smokeless blank cartridges (except grenade-launching rounds) are loaded with ultra-fast-burning powder made especially for blanks. It is not sold to the public because it produces very high pressure when loaded behind a normal bullet - and there's always somebody who won't heed the warning label.

For those who don't mind smoke, stench, and corrosive fouling, ordinary black powder makes nice loud blanks - and even a full case won't produce excess pressure. Just be sure to wash barrel and brass with hot, soapy water soon after firing.

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[infidel]

thanks guys, upon further research etc., what I'm looking for is not so much blanks, but grenade launching blanks. any info on that?
Out of curiousity, I pulled apart a IVI 7.62 round and a IVI 7.62 blank (where did that come from anyway?) and the powders are very different, and the blank only had about 1/3rd weight.