Search results
Results from the WOW.Com Content Network
The hand-lapping technique uses a wooden or soft metal rod to pull or push the slug through the bore, while the newer fire-lapping technique uses specially loaded, low-power cartridges to push abrasive-covered soft-lead bullets down the barrel. Another issue that has an effect on the barrel's hold on the bullet is the rifling.
In 1980, two rimmed cartridges based on the .308 Winchester were introduced for use in the Winchester Model 94 XTR angle eject rifle: the .307 Winchester and the .356 Winchester. In 2014, the rimless 45 Raptor was introduced to provide a big bore cartridge for the AR-10 by combining the .308 Winchester with the .460 S&W Magnum. [citation needed]
Ballistics is the field of mechanics concerned with the launching, flight behaviour and impact effects of projectiles, especially weapon munitions such as bullets, unguided bombs, rockets and the like; the science or art of designing and accelerating projectiles so as to achieve a desired performance.
The .308 Marlin Express is a cartridge developed in 2007 by Marlin Firearms and Hornady. It is based on the .307 Winchester with a goal to duplicate .308 Winchester performance. The cartridge uses a slightly shorter, semi-rimmed case similar to that of the .220 Swift to function in lever-action rifles.
O ratio is also used to predict barrel life in cartridges of the same caliber, but not of different calibres, since the ratio is an extensive quantity that does not correlate to temperature or pressure (e.g. a .50 cal straight cartridge may have the same overbore as a highly necked down .17 cal cartridge).
The 7mm-08 Remington is a rifle cartridge that is almost a direct copy of a wildcat cartridge developed around 1958 known as the 7mm/308. As these names would suggest, it is the .308 Winchester case necked down to accept 7 mm (.284) bullets with a small increase in case length.
While standard rifle barrels taper from breech to muzzle, high precision rifles will often use a barrel with far less taper, called a heavy barrel, sometimes leaving the barrel cylindrical all the way to the muzzle, called a bull barrel. Either technique greatly increases the stiffness of the barrel by enlarging the average diameter, but this ...
A desirable side effect is that the expanded bullet makes a larger hole, increasing tissue damage and speeding up incapacitation. While a bullet that penetrates through-and-through tends to cause more profuse bleeding, allowing a game animal to be blood trailed more easily, in some applications, preventing exit from the rear of the target is ...