The problem is you have various types of cat 6 cable. It ranges from 200Mhz to 550Mhz versions. Each for specific implementations. I've read that you can take the lower 200Mhz Cat 6 and run it up to 295' maximum. What data rates will you get on 200Mhz Cat6? Don't know. If you want to know for sure you should try contacting a cable manufacturer. They will get you what you need. I'd try BELKIN, AMP, MOHAWK, PANDUIT...any of those could tell you more about Cat6. Hope this helps.
"I can picture a world without war. A world without hate. A world without fear. And I can picture us attacking that world, because they'd never expect it."
- Jack Handey, Deep Thoughts