low pressure condor

i was shooting the other day and was lazy and did not fill my gun back up around 2000 psi back to 2650 and shoot it to 1500, i noticed the power was a little lower but it seemed to be more consisant. my question is do any of you run your gun at lower pressure and what range. and what benifits do you get other than easier pumping and more scuba fills (i have both but use the pump most), because i may try something new. i did notice that it seemed like more volume of air was coming out of the gun maybe the effiancy is lower but i can adjust things to fix that.