Happy Pappy, this issue is worthy of it's own thread. At 20 yards you should easily be able to keep dropping the arrow down the same hole. Fire up a thread and we will work it out, something is wrong and I would bet my last dollar that it will be easier than you think. There is no such thing as an Excalibur that does not shoot great.

Boo's strings.. I shot my deer this weekend at 3 yards eye level, it didn't even flinch at the sound, Wish I could say the same about me, I have been flinching ever since!