Daystate Wolverine B-Lite .25

Has anyone experienced flyers from the first two shots with a full Daystate magazine? I was shooting a good bit today @ 25 & 50 yards. My groups at 25 are tight , sometimes just through the same hole. However @ 50 yards groups are not so good, seems the first two shots from every full mag, go high and to the right. Then the remaining 8 shots stay inside a nickel.( most of the time, but not always) Another thing I noticed today when I get down to near 2000 psi, right after I shoot I hear a tiny bit of air for just a second or two escaping from the muzzle. I am going to chrony it again tomorrow, to see if it has changed.