and still no one has asked what size paint is was compared to the barrel,, how old was the paint did you size it, ect ect ect..
we have to start with the most basics here,, if your paint is smaller than the bore of your barrel,, then your crono readings will be all over the place,,
time for a freak back or some such,,
i make custom barrels with half size inserts to get rid of this problem..
even my sp1.. with a sized barrel to match paint runs 279 275 278 280 273 ect ect,, size your balls and use that size barrel,,
if you cant,, then when you get to the game in the morning,,walk around the other players and ask to see there paint,,, then chose what paint your going to buy as its the paint that fits your barrel,,
this is the most basic and simple stuff,,, that all of us should be doing,, and im suprised only one person picked up on it,, strange,,
not a put down or a moan,, you know me by now,, but this is really basic stuff,, all paint changes size from box to box,,
even the same box,, will change size as the day rolls on,, cold in the morning hot in the after noon,, if you see what i mean,,
HOPE this helps,, and should see your marker running much better,,, by the way a small tiny bit of air at the feed neck means your paint was to tight,,and you where getting air rebound,, its normal if you dont have a sealed barrel or breach oring,, to seal the bolt into the barrel at point of fire,,