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To those who replied to this thread.
I should have been clearer n my OP.
I am not trying to get hi velocity .22 to go subsonic. I was more interested to see if standard velocity (which is generally...

Thanks for that gundoc (and all others). .22 will be for close range rabbits etc. I have a 17HMR (or .223 rem) if anything bigger or father away needs dealing to. Sounds like 16", subsonic and a big...

Thanks. Was going to try a few different rounds to see what the old thing liked.

Excellent. I don't particularly want a very short barrel but am cutting the "big fat bit" off the end of a Toz to put a suppressor on. Looks like the plain old sub will do the trick.

Ok. Thanks for that. I definitely didn't know that.
Now I will just have to decide how short to go so subs don't go supersonic.

Good questions.
I would be using it for small game at short range,Up to 50m maybe.
I figure if I use sub rounds the velocity will drop to below optimum with the shorter barrel. I would like to be...

How short would you have to cut a .22lr barrel to get supersonic ammo below the speed of sound? Is it possible/practical?
I know this would vary depending on the ammo used but has anyone tried it or...