The semi-automatic rifle is considered to be the weapon par excellence of modern hunting. Since the dawn of its development proved to be extraordinarily effective weapon, first hunting for ducks in a short time but then for all hunts achievable with the smooth barrel.
He very quickly overtaken by the preferences of many European hunters brace that is superimposed on that have stood only a few countries where hunting had a strong tradition in two shots. But which offers substantial benefits against shotguns with barrels adjacent or overlapping. The advantage consists in the barrel of the automatic only, which has an excellent ballistic efficiency and allows shooting accuracy at any distance, being the line of sight axis with the only cane. This is a unique and free to vibrate during the shot, to stretch and dilate in the heat, not being bound to another rod in the idle state.
This involves pink with a regular distribution of pellets. The unique barrel allows for greater visibility of the target and aiming accurate and fast. The semi-automatic is the son of an industrial process completely and with a modest cost, you can replace or only its shrinkage by interchangeable chokes, replacing them in a few seconds even on the hunting ground of fact and modifying the ballistic characteristics of the weapon. E ‘weapon is robust and has a total interchangeability without adjustment of all the mechanical parts, obtained with micrometric precision by means of a machining cycle machines programmed.
For his work comes at a price lower than the double-barreled shotgun, even with the same finesse in execution. It remains the best weapon for many forms of hunting, especially waterfowl for that, even if the national hunting legislation limits the number of shots that can shoot three and the weapon loses a bit ‘of its potential. The semiautomatic proves to be the most suitable type of weapon to shoot the increased loads lead to higher long-distance shooting accuracy and reduced recoil that can be achieved with the repetition system to draw gas.
In 1880 the brothers Clair St. Etienne invented the first automatic smoothbore, operating in outlet gas. They had no regular operation because many lees produced by the combustion of black powder were able to plug the hole of taking gas from the barrel. With the arrival of the long-gun recoil of John Moses Browning in 1898, the problem of the construction of the automatic pellet, it could almost be said to be definitively resolved, but other manufacturers took up the idea of obtaining energy for the reset cycle, subtracting part the firing gas for use in through pistons. In semi-automatic hunting based on this system (also called a subtraction or taking of gas), the fixed barrel carries two or more holes at about 25/32 cm from the breech end. These holes convey a small part of the gases of the charge in a cylinder of expansion, which is welded under the barrel. The piston transmits the movement of the shutter through a sleeve combined with the arming rods.
The shutter is bound to the barrel by a locking lug, which fits into the sleeve. Under the strong pressure of the gas, the piston causes the release of the shutter closing and relegation, while leaving the shell fired from the barrel. After the withdrawal movement shutter, one or two springs ensure it back in closing, inserting a new cartridge in the barrel. Today, most of the arms industries have a production automatic subtraction of gas.
These include the Pietro Beretta did subtraction of gas its workhorse, giving birth to an original and functional, which uses a piston to piston rings. The patent Beretta and its success is due to the piston such that the piston has self-cleaning characteristics and that compensates for the different pressures caused by many different ammunition, varying the sliding friction of the cylinder. The semi-automatic Beretta, in recent decades has undergone updates is technical improvements, thus becoming a perfect weapon, well known and appreciated by hunters around the world.