I currently shoot Beeman ICS 400 carbon arrows and have for 3 years. After changing from mechanicals to fixed broadheads (same wt. 100 grain), the Beemans seem to be "heavy". the flight takes the arrows down. They shoot a few inches low.

Anybody shoot the Carbon Tech Whitetails or Cheetahs? If so what is your experience.

After reading up on them, they seem to be lighter and have a better spine. If they are a bit lighter but have better spine tolerances, I'm wondering if penetration will be better or worse?

It's probably not your arrow that's affecting your flight it's your new fixed blade broadheads

Make sure your blades line up with your fletching's and see if that makes a difference.

nubo