I have noticed this in the last 2 tounys I have played. I chrono the Lv1 to 280-290 and when I ramp over the chrono (mills mode on marker) it ramps over 300fps while single shots are 280-290. Need to change to 270-280fps to keep ramping under 300fps. My settings are: Mills mode ramping. all settings stock inc dwell. gi 4* paint with bore matched barrel solenoid is 7/7 with new duracel ind battery. No leaks. Tank output 5-600 psi. Bolt and rammer freshly oiled.