Since the problem is most likey timing, just hit vantrepes site, the link is at the bottom of his bio. If you have problems after that then we could look at other causes-
To check to see if you have a bolt leak, as long as you have a standard ball detent, then blow down the feedneck with the bolt forward. If you hear leakage then there is going to be air blowing back up the feed when a ball is shot. If it seals well then the timing is to blame.
Josh
To check to see if you have a bolt leak, as long as you have a standard ball detent, then blow down the feedneck with the bolt forward. If you hear leakage then there is going to be air blowing back up the feed when a ball is shot. If it seals well then the timing is to blame.
Josh