Quote Originally Posted by eyebull View Post
Though the invention of PCP predates CO2 by some margin, I don't think PCPs were commonly available at the time. Even if they were, the need for an expensive scuba tank as opposed to relatively commonplace CO2 tanks, and the relative expense of the powerplants (CO2 operates at a much lower pressure and is somewhat self-regulating, thus cheaper than PCP) would have bolstered his argument, not negated it.
Hi, several years ago I experimented with building a 'sparklets' bulb powered gun. Not a rifle but a double barrelled .410 bore pistol, I was amazed at the power! and during my experiments I found that co2 works better in larger bores. I guess it's to do with expansion rates. I did not progress any further, as I don't like porridge! but it could have been even better if I had fitted some sort of heater device.
best regards Al