You get worse velocity using HPA because there is no liquid to expand, like CO2
However i would also be interested in threading a goblin Deuce, because due to the length of hte barrel/ catridge of the Solo (less so on hte Duece because of increased length) the ball does not have enough space to reach maximum velocity...
People experimented using freak inserts instead of the cartridge casings and only got positive results.. however i think the area that allowed a freak insert to be used was filled in...
If that makes any sense
