Most guys use high pressure air, because it's cheap and available. Some of the guys frequenting the aigun forums have played with helium, got good speed, but it's expensive, and has issues with sealing. Not real practical for backyard shooting, but it was done. There have been some VERY fast helium airguns built for laboratory work, where extreme pressures were placed behind the projectile, while a vacuum was pulled in the area in front. Dumping more CO2 will make more noise, but not improve performance. CO2 has the further limitation that the gas self limits it's pressure in that it liquifies above a set point (varies with temperature, but around 950 psi+/-). CO2 is relatively slow, air faster, nitrogen a bit more, and helium is very fast. Better minds than mine have explained it, but the basics is that you cannot get speeds in excess of the supersonic velocity of the gas that you are using, as that is the finite limit of speed available. If you are using CO2 for the power source, about the best you can get under optimum conditions is a little over 800 FPS. ps i used paintball gun CO2 tanks for the air source," 22 rifle so it has to shoot atleast 1500 fps i suppose you could scale it down to.
#PCP AIR RIFLE FORUMS CRACK#
" i havent cronoed it yet but it has the same muzzle crack as a. I believe that one of these guns is in the Smithsonian(sp) and another at the Springfield Armory museum. I have seen references made to them several times since. There was an article in American Rifleman back in the late 1950's about these guns. In fact Lewis and clark had one on their expedition and took Grizzly bears and elk with it. They havd a reserve tank and shot large bore round balls. During the earlie 1800s there were gass guns developed that worked off burning powder. To fill your PCP gun: 1.Pick a source of air shown at right 2.If an adapter is needed, one will be shown 3.Add both to your cart to get hooked up FX Maverick Sniper PCP Air Rifle with quick-disconnect connector (1M) To start over click reset. The speed of sound with compressed air or other gasses is about the top of the velocity chart unless you have found some way to super compress oneof these gasses.
#PCP AIR RIFLE FORUMS FULL#
Nitrogen comes in a full tank about 5,000 psi. CO2 expanding from a liquid to a gas alpne can not achieve that kind of pressure. They develope about 18,000 cup preasure in a rifle. A 22 LR high velosity standard is about 1300fps. The speed of sound is 1080 fps at sea leavel at one atmosphere. It would be interesting to know what it is really chronographing.