Tactical Air Sports of Escondido, California has finally received it's first shipment of Predator gas from Abbey Supply Company and tested it on a wide variety of gas pistols. We used Western Arms, Tokyo Marui, KSC, and KJW gas blow backs and KJW non gas blow backs during the test.
We loaded separate magazines with each type of gas and 10 BB's in each magazine. Each shot was one second apart. In every gun tested for the fps, the Abbey gases fired between 2 and 5 fps slower on the initial shot.
During the shooting, the Abbey gas "leveled out" and did not decrease at a steady rate like the camo cans of 22 gas or the black cans of 134a gas. The final shots on each gun varied between slightly faster and slightly slower in fps than the regular gases.
Overall, this would indicate a slightly higher average fps for the Abbey gases. In the non blow back models, there was no noticeable performance advantage for either gas. This was probably due to the poor design quality of the models used.
The Abbey Ultra Gas is not 22 gas, but a totally different formulation. Having worked in the military NBC field for the last ten years, I have had to supervise the Hazmat programs for several local armories and their maintenance sections. The 22 gas that is used in Airsoft pistols is very close chemically to Freon 22, which is much more dangerous to the Ozone layer than the 134a gas or Ultra gas. It is so close that 22 gas is banned in Europe for this very reason.
Since the new Abbey Ultra Gas performs so closely to our current 22 gas, it would be a wise choice to use it whenever possible instead of 22 gas. Even though it costs us more to purchase it, we will be carrying this gas in the future as an environmentally responsible substitute for 22 gas.
On a technical note, the oil that is used by Abbey in their gases is a high pressure oil specifically designed to be stable in these gases. It is very good for the seals used in airsoft guns. It probably also explains why 22 gas appears to be "dry." Abbey told me their Predator gases will not harm your pistols, and will actually increase the life of the working parts inside the slide valve assembly.
Overall, their Predator Gun Gas 134a and Ultra Gas is a very good substitute for what we are currently using. It will help the environment, and make Airsoft look more responsible to some of our skeptics in that community. As everyone knows, we can use all the help we can get out here in the Republic of Kalifornia.