Well uh, What did he say? I've done it myself and gotten good results. Also some not so good ones, and I don't know whether it was the jig, or some other problem.
One thing that helps with the jig is a nice big drill press table.
For another wild card... If you can find a cooperative law enforcement agency, you can transfer the supressor on a form 5, (tax exempt) and they can transfer it to the out of state dealer, (also exempt). Of course its another transfer, but transfers to law enforcement get expidited.
Has anyone used IMR 7883? I'm not finding data anywhere. I'd like to load it in a .22/250 and have been informed that a 15% reduction from IMR 4831 is the place to start -if it doesn't overflow the case, as its bulky (7lb to the gal).