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Rifleman's rule is a "rule of thumb" that allows a rifleman to accurately fire a rifle that has been calibrated for horizontal targets at uphill or downhill targets. The rule says that only the horizontal range should be considered when adjusting a sight or performing hold-over in order to account for bullet drop.
Cruise control buttons can adjust the speed on some vehicles. [2] Applying pressure to the accelerator or brake pedal will override the HDC system. Later implementations combine HDC with traction control and low-range gears and have reduced the set speed to slower than walking pace for extra control.
Especially the non-shouldered (non-"bottlenecked") magnum rifle cartridges could be pushed too far into the chamber and thus cause catastrophic failure of the gun when fired with excessive headspace; the addition of the belt to the casing prevented this over-insertion. Bipod: A support device that is similar to a tripod or monopod, but with two ...
The action lever is located close to the trigger, and is accessed by slightly moving the index finger off the trigger. Pulling the lever rearwards ejects the spent casing. The bolt is then pushed forward using the thumb, upon which the firing hand lands naturally in the pistol grip so that the shooter is ready to fire immediately after ...
Some other notable modern straight pull bolt-action rifles are made by Chapuis, [9] Heym, [10] Lynx, [11] Rößler, [12] Strasser, [13] and Steel Action. [ 14 ] In the sport of biathlon , because shooting speed is an important performance factor and semi-automatic guns are illegal for race use, straight pull bolt-actions are quite common, and ...
A hill-holder is a motor vehicle device that holds the brake until the clutch is at the friction point, making it easier for a stationary vehicle to start uphill. By holding the brake in position while the vehicle is put into gear, it prevents rollback.
By 1911, Farquhar and Hill revised their rifle, changing its source of energy from barrel recoil to more convenient gas operated action. The new weapon also used an intermediate spring as a source of energy for cycling of the bolt with a stationary barrel, simplifying design and making it potentially more accurate and reliable.
In non-recoil-operated firearms, it is generally the entire firearm that recoils. However, in recoil-operated firearms, only a portion of the firearm recoils while inertia holds another portion motionless relative to a mass such as the ground, a ship's gun mount, or a human holding the firearm.