Anyone out there try these things? The writeups especially from Groove look promising but we all have been bit by overzealous promoters.

Never heard of them. Do they have a web site? Good luck.

Yep - they do have a website:

http://www.groovebullets.com/

The principle behind them looks similiar to the thinking behind the new Barnes Triple Shock bullets. I' m gonna have to try one or the others of these soon to check out the theory for myself.

Mark Whiz:

THanks for the site.