WHAT WE LOOK FOR WHEN BUYING A RIFLE ?
The first thing you ask is the demos that we want to use . Depending on this , will look for a more forceful or more accurately. If our decision is based on having a greater force , we opted for high caliber , ie , we must choose at least a 5.5 caliber (0.22) . It is also preferred by other fans because their effectiveness over long distances is greater at lower gauges. Its larger diameter and heavier make clear that the kinetic energy is higher and reached the target with a strong force .
Its ballistic coefficient is low ( numerically ballistic coefficients are inversely proportional to the pointing digit ) , so go slower than 4.5 but will retain most of their energy in reaching the target as I said with much more power , making that the impact is stronger and safer than long with 4.5 distances.
The flight is slower but more accurate, since the wind this caliber it hurts less so. This caliber is favorite hunters but rather is also used in the Sniping for reasons already cited .
The 4.5 caliber (.177 ) . The smallest is the most known and used in Olympic competitions exclusively. Normally used looking pure precision and usually in short distances and indoors, although Field Target competitions also used . We should add that , thanks to the low weight of their bullets that rarely exceed the 0.53 grams , ideal for extraordinary speed , like optimal precision , since its trajectory is more tense and uniform.
But it also has problems of its own characteristics. Its accuracy is good, but its light weight , to environments with climatic difficulties , makes it an ineffective caliber , because the wind drag and magnitude greater extent than any other so the experience and ability to handle long distances must be much greater than having to also control variations turbulence . Another problem is the energy released to reach the target, which is minimal, since, as I said , the fastest projectiles lose more energy out than go slower , so the 4.5 loses much about calibers greater.
WHAT ARE THE ADVANTAGES GAS SYSTEM RAM ?
This innovation used by various brands under various trade - IGT denominations Gamo, GRS Norica or GPS Kite- , is a compressed air system based on a piston which replaces the classic spring ( it's a similar sort of cushion to having many cars on both sides of the trunk ) .
The system consists of a sealed cylinder whose interior is pressurized gas which , when cocking the weapon further compresses the gas . This system eliminates vibration and mechanical noise generated by the spring helping to reduce , to some extent , recoil . In addition , the time taken to expand, is smaller than that used by the classic spring , which increases the accuracy because the pellet has less time in the barrel , reducing friction and other harmful forces during firing.
Another advantage , although we discourage this practice to be dangerous , is it possible to leave the rifle loaded for days. Should note that the spring loses its elastic properties if left cocked for a long time .
In summary :
- Decrease the total weight of the rifle .
- Reduced recoil.
- Elimination of vibrations .
- Reduced mechanical noise .
- Increase accuracy.
- No deterioration through prolonged effect cocking .
HOW DO RIFLE PCP?
The PCP system rifles come with a storage tank of air, which passes through a valve to a loading mechanism . With the trigger pull the valve opens and the air is released in full boost pressure providing ammunition gun shot out at high speeds.
Air pressure in the reservoir decreases successively with every shot , although this varies depending on the model gun . However , the changes are not very pronounced offering very similar shots.
The biggest problem is attributed to weapons of PCP is the charging system air tank . Today it continues to innovate in this area trying to facilitate filling the tank incorporating systems of multiple pumping , however , the most common system used is the use of hand pumps , but require substantial physical effort, have a lower cost they may have other charging systems . Electric pumps as comprensores performing reloading rifle accurately and quickly but can also be used , the cost is very high.
Another system used is the use of tanks high pressure ( 3000 PSI = 300 bar ) external . The most common are employed in activities scuba diving , ie the Self Contained Underwater Breathing Aparatus , more popularly known as SCUBA . These tanks supply air to the pressure required for the gun through a series of adapters . The disadvantage of these tanks is that they can be expensive and sometimes difficult to conseguir.Recientemente using PCP rifles and pistols are somewhat displacing the CO2 airguns .
As many users say airguns , the advantages of PCP rifles vs. carbines CO2 are varied, but all of them can be completed in one: more precisely.
First PCP carbine , like the CO2 , has a reverse ( blow gun carried over the shoulder of the shooter at the time of shooting) almost imperceptible. This provides greater accuracy to the weapon being less vibration , and the number of problems related to the accuracy precomprimido.Las airgun CO2 guns have their main disadvantage that the accuracy and speed of the shot depends greatly reduces the ambient temperature at which the shot is taken due to the specific physical properties of the gas.
In warmer environments the pressure and velocity are higher than in cold environments. Also on weapons of carbon dioxide made the shot gas temperature drops sharply thus decreasing pressure and speed , so it is recommended intervals between shots to retrieve the gun temperature. This is a feature that no PCP rifles since they are practically insensitive to temperature changes and pressure changes are inferiores.En summary we can say that the rifles and pistols precompressed air ( PCP) are a group of arms high precision and power that are very effective to practice shooting.