Did you lower your velocity at chrono AFTER installing TechT bolt?. I've read fps jumps up about 50 fps when switching to the [lighter] tech t bolt. If your shooting 330 instead of 280 fps, that would be causing your breaks right there.
Another tip I've learned with my TiPX... the longer the balls sit in the mag, the more likely they'll be to break. I load all 4 of my mags in the beginning of the day, and then if I haven't used them by mid-day, I re-load the mags with fresh paintballs. This lowered breaks for me.
I have an MRX bolt on order, so we'll see how it compares when I get it.