Tuning tuning problems m3

When I shoot a shot string the first shot is 20 to 30 slower then the rest of the string. My first reg is 150 sec is 135 mirco is 4 and marco is 16 valve is on line 4. Is there something I'm doing wrong with my tune or is there something I can do to the gun to fix this problem?

My settings are very similar but I have my second reg at 100