Has anyone used one of these adaptors in their drilling ie 9.3X72R. Trying to get a more versatal (sp) weapon.

Take a look at 'mags' post on Jan 15 of this year. I will eat some of my words after using a Krieghof insert in 22 mag, like pictured at the end of the posts. That posting got me focused and found a drilling for sale with one in place. I had not used one of those prior to my comments on that post. Now own one and am impressed. Mine shoots quite well. I do not know where you can find a new one. Hopefully, some other posters can help on that. As far as regular chamber inserts go, they seem to be best suited to close range stuff and are fun to play with, but tough for fumble fingers like me.
Bfly

the adapters go into the shotgun barrels - at least the adjustable ones

i'd be leery of sticking one into the rifle barrel.