First I have heard of these - look very nice for year round shooting!
Quote:
The 15cc size Nitrogen cylinders are identical in size and shape to 12 gram CO2 cylinders.
They use a 1.8 gram fill to work with the same mechanisms and internal seals as 12 gram CO2 cartridges. Using more than 1.8 grams could damage the air pistol with too much pressure. The Nitrogen cylinder fill at 1.8 grams is 1700 PSI at up to 95 degrees. CO2 is 850 PSI at 70 degrees, however, pressure increases with the temperature. For a 15cc Nitrogen cartridge, 1700 PSI is at the lower end.
For use in air pistols, the recommended fill of 1.8 grams in a 12 gram-sized cylinder will give you commensurately fewer total shots. The number of shots, according to Leland Gas Technologies, depends upon the design of the gun and its operating mechanism but it will still be less than with CO2.
While Nitrogen will not deliver the same total number of shots, it will work in temperatures where CO2 can’t, and Nitrogen cartridges are also not affected by higher temperatures in the 90 degree range. Thus the number of shots you get from a cartridge will be the same regardless of the ambient temperature. It all depends upon the gun. This is not to say that nitrogen PSI levels never fluctuate in severe temperatures, but the range of the 1.8 gram fill is an optimum 1700 PSI at up to 95 degrees. At an arctic low of -50 degrees, the PSI drops to 1200 and at +150 degrees, it increases to 1900 PSI; two temperature extremes few of us are apt to experience. (Leland’s graph for pressure and temperature actually goes all the way to +250 degrees).
Leland also makes high performance 12 gram CO2 cylinders under their Special Force Military Grade, which are used by the U.S. military for training guns and in paintball airguns. These are high end, precision filled CO2 cylinders that will give better performance and accuracy in air pistols. We’ll review them later this year. The Special Force CO2 cartridges come in a 12 pack for $9.60. Nitrogen, as you may suspect, is quite a bit more than the 80 cents each for a 12 gram Special Force CO2 cartridge. Nitrogen cartridges come in a 5-pack for $12.50. Leland does, however, have a price break for quantity purchases. Nitrogen gives you year round shooting capability, and for some, it is hard to put a price on that.
http://www.lelandgas.com/contact_us.htmhttps://www.pyramydair.com/airgun-experience/5541-2/
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