Barrel twist

[alorton]

Originally Posted by HUNTER2

You probably already know this - but - I would get them around the speed you want before the can is attached. I nearly screwed up a good can with a slower than expected 220. Good luck....

Actually I hadn't thought of that, but it makes sense. Thanks for the heads up.

The only subsonic stuff I've done before this was with a suppressed .22LR, so there is not a roll your own option. This is all new to me so any little tips like that are welcome.