Now that I didn't know about the older molds, that's a nice fact. I'll have to weigh the discs and see. The reef is a friend of mine's and he told me that it was a 175 but wasn't too sure. If it's lighter then that would explain the extra glide. And for the fact that it was a completely different plastic, I think they call it sp.
Driver: 175g z stalker, 2x174g surge, 174g z predator, 174g flx Avenger SS, 174g esp pulse, 174g z force
Mid-range: 178g FLX, Z, TI buzzz, 177g z wasp, 177 flx drone, 177g meteor
Putter: 175g flx challenger, 2x175g softapx, 2x175 pro-d challenger