I just put a pair of 275/60/15 MT ET drag radials on my Charger. The side wall has a max air pressure of 44 psi. What should I defalte them to at the track? I was told 22 psi. Does this sound right?

And 2nd, what's the general rule with the psi on the street? Should I inflate them to 4-6 psi under the max?