I actually have one of those barrels for a phantom. Picked it up on here for I think $50 if I recall, freak bored and all. Don't quite have a working phantom, but I do love that barrel. It was notoriously effective back in my duckslide days, but I couldn't tell you if that was due to the freak boring or anything else. What I can say, is it is quiet, and deadly accurate with good paint. Right on par with the Woosh on my Redux.
$aint, just out of curiosity, is yours set up to use the shell sizers, or are you using the SR1 cocker barrel adapter? I need to check and see if Bill has any more of those.