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The .257 Roberts, also known as .257 Bob, [2] is a medium-powered .25 caliber rifle cartridge.It has been described as the best compromise between the low recoil and flat trajectory of smaller calibers such as the 5 mm (.22 in) and 6 mm (.24 in), and has more energy, but is harder recoiling, similar to larger hunting calibers, such as the 7 mm (.28 in) and 7.62 mm (.30 in).
The Tornado is based on a .257 Roberts case that is improved and necked to .30 caliber, essentially the same as the .277 ICL Flying Saucer, but necked-up. Performance with a 150-grain (9.7 g) bullet is up to 3,360 ft/s (1,020 m/s), with a 180-grain (12 g) bullet is up to 3,030 ft/s (920 m/s) and with a 220-grain (14 g) bullet is up to 2,800 ft ...
The .257 Weatherby is used as an ideal small predator cartridge for animals such as lynx, cougar, bobcat, fox, coyote, and wolverine, all of which are taken yearly with the cartridge. While the .257 Weatherby can be employed as an effective varmint round, the cost per cartridge and the muzzle blast precludes its use as a varmint cartridge in ...
Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point. This is a table of selected pistol / submachine gun and rifle / machine gun cartridges by common name.
The term caliber change in firearms refers to the process of permanently altering a firearm to allow it to fire a different cartridge than the one it previously fired. With a bolt action rifle, this is mostly done by reshaping the current chamber through machining it with a new reamer, or by replacing the barrel with a new barrel, which has a new cartridge chamber machined into it.
A caliber conversion device is a device which can be used to non-permanently alter a firearm to allow it to fire a different cartridge than the one it was originally designed to fire. The different cartridge must be smaller in some dimensions than the original design cartridge, and since smaller cartridges are usually cheaper, the device allows ...
Note about donor cases : The 7.62x51 military cartridge the civilian version is the .308 cartridge. Since its dimensions are taken from the 30-06 cartridge from the 1906 US Army cartridge, the lower half of these case dimensions have been used for designing the .243 Winchester, 25-06, .270 Winchester, .280 Remington, 7mm-08, .308, .30-06, .35 ...
Performance is very close to the .257 Roberts. Arguably it is a better overall cartridge for hunting than the more popular .30-30, but in recent years has lost ground to the .257 Roberts and flatter-shooting 6mm cartridges such as the .243 Winchester. [3] Currently, there are very few new firearms being made in .250 Savage.