My last carbons were Beeman's with the outserts (to give you an idea of how long it's been). I shot them from an 82# longbow. I had no idea what they weighed, and don't remember the spine--most likely that same one isn't made anymore. Back when I shot carbon, Beeman's were about the only ones available, with a couple other companies testing the waters but they were hard to find. Nowadays, you can find them everywhere, but it seems different stores carry different brands, and they all have their own ratings for spine. Sorry I'm not more help.

Chad