Besure towax the cables and strings as coyote said. Make sure thescope is properly attached. When you buy more boltshave them weighed.If the weight is 30 or 40 grains different from those you used to sight it in then your zero is off. Every set of bolts that i have ever gotten from Barnett weighs different from the others.

Watch your fingers and thumb.Too many folks have been seriously injured whenfingers got in the way of the string.Be really careful not to dry fire it. Good luck with your Barnett 400.