I've had my TAC 8 for a year. If I chrono it for 270 fps as recommended, I get right at three magazines per 12 gr CO2. On a cold day, the last couple of balls are a little weak.
I've never had a problem shooting any kind of paint through it.
My wife uses it more than I do though. She shoots wasp nests with it. We live in a 2 story house and they always build nests around the eaves. One shot and it kills most of the wasps from the impact and it takes the nest down.
I've tried video taping it because I figure someday she's going to get herself wrapped up, but so far, nothing funny for youtube.

The one bad thing I will say about the TAC 8 is that it is freakishly large. The only thing I've ever held in the real firearm world that was close to that was a Desert Eagle. Wear a good belt or your pants are coming down!