too high speed 1st shoot

[KostasXios]

hi! my xmag has a little problem... when i chrono it the 1st shoot is about 330 fps but when i continoue to shoot the marker speed is about 280.
that happens only i stop shooting for a while.
what can i do to solve the problem?

[yakitori]

maybe you need a new reg seat holder.

[athomas]

Your reg seat o-ring is bad. The high pressure input is weeping into the front chamber over time.

[Tunaman]

Are you chronoing it properly? You can't just pull the trigger like every other gun. The procedure must be followed or it will chrono wrong.

[KostasXios]

i am sure i chrono it right. every time i try to adjust the velociti the 1st shot is about 30-40 more fps than then 2nd

[zzbudzz]

i just got a autmag about a month ago, how do you chrono it? what is the procedure? thanks in advance!

[KostasXios]

it solved!!!!
thanks guys!
u can chrono a mag is simple as other markes...no diferences

[yakitori]

what was the problem?