You need to let the spring bed in as it can change through the first say week on play.
Most of the time airsoft sites don't accurately chrono as they set the chrono to .2's and then use a conversion sheet (which isn't accurate at all).
They should change the settings on the chrono, but it takes too long to swap about, especially when they have many players to chrono.
if you can also take your chrono and compare it with theirs it would help them see you aren't over on the limit.
but many site will state if it's over on their chrono you can't use it.
best chrono yours using .2's at home and go off their conversion table to be sure you aren't over on that site
most sites show their conversion sheet somewhere, either at their site or their website.
hope this helps
funny to see how well the whole thing turned out 
