Q: Has anybody ever fired a Slug with a 9mm P.A.K gun ?

I'm interested whether it is possible to launch a slug projectile in either .22 or .25 with a blank gun, chambered in 9mm P.A.K or otherwise 8mm or even .22 Long, although I've seen a Russian guy do that already in a video on You Tube, where he used one of the Viper series of Ekol's line of blank revolvers, to fire a .22 caliber pellet (a Kvintor Alpha pellet I think) through a suppressor like shroud, that wasn't really a suppressor, but in fact a screw-on .22 cal. smooth-bore barrel, that the Russian attached to the muzzle of his blank revolver. The pellet's velocity reading on the chronograph, after he shot that 12 grain pellet through it, was at around 800 fps ~ 260 m/s.

Now, I'm genuinely curious how a .22 cal. slug ( weighing at about 25 grains - like a, e.g. JSB KnockOut ) or even a .25 slug would perform out of a similar screw-on attachment (let's say with a barrel 2.5 inches long), propelled by the expanding gases from a 9mm P.A.K blank round. Has anybody ever tried something like this?

The only two videos portraying such activity, that I've so far found on YT, were of these two individuals using 9 mil blank pieces to launch nails and ball bearings with blanks:

https://www.youtube.com/watch?v=3b9-YBLdIY8

https://www.youtube.com/watch?v=7U1XFhFr30s

So, what do you folks think?