So, I'm in process of having a rifle built for hunting. I remember seeing a pretty slick 50bmg military rifle at one point with very aggressive spiral fluting on the barrel. Problem is, I can't remember what it was and I can't seem to find it back. Anybody have any ideas? I'd really like to pattern my barrel after that. Most spiral fluting I have seen isn't as aggressive, so it's hard to visualize. thanks for any help.