Pro Velocity Problems

[Puddleglum]

My friend's Pro was shooting at around 26-270 yesterday, and then all of a sudden he couldn't get the velocity under 300. Does anyone know what the problem would have been, he was using the blue spring.

[Hsuve]

Change the main spring to a weaker one, or snip the main spring 1-2 coils.

[marc]

yep
i had to cut my spring as well

just a coil or two, maybe more depending on what fps you play at.

[Puddleglum]

Well I knew about cutting the coils, and I can do that. But what puzzled me was why he started the day shooting in the 260's and ended shooting over 300. Any ideas?

[Hsuve]

CO2 expands as the heat increases. Usually it's cold in the morning and temperature increases as the day goes on. Thus CO2 expands and pressure increases. That's my guess. :)