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Monthly Archives: April 2019

  • .260 Remington

    .260 Remington

    260Remington.jpg

    The .260 Remington (also known as 6.5-08 A-Square) cartridge was introduced by Remington in 1997. Many wildcat cartridges based on the .308 Winchester case had existed for years before Remington standardized this round. Although loaded to higher pressures, the ballistics of this cartridge are basically similar to the 6.5×55mm when bullet weights do not exceed 140 grains. When loaded with heavier bullets, the 6.5×55mm is capable of greater velocity.[1] Due to its shorter overall length the .260 Remington can be chambered in a shorter length action than the 6.5×55mm.

     

    Because 6.5 mm (.264") bullets have relatively high ballistic coefficients, the .260 Remington has seen success in rifle competition including bench rest, metallic silhouette, and long range. It is capable of duplicating the trajectory of the .300 Winchester Magnum, while generating significantly lower recoil.[2] Also, converting a rifle chambered for the .308 Winchester (or any of its offspring, such as the .243 Winchester, 7mm-08 Remington, or .338 Federal) to .260 Remington generally requires little more than a simple barrel change.

  • .257 Weatherby Magnum

    .257 Weatherby Magnum

    .257 Weatherby Magnum Cartridge with .308 Win and .375 H&H.JPG

    The .257 Weatherby Magnum is a .257 Caliber (6.35 mm) belted bottlenecked cartridge. It is one of the original standard length magnums developed by shortening the .375 H&H Magnum case to approx. 2.5 in (64 mm). Of the cartridges developed by Roy Weatherby, the .257 Weatherby Magnum was known to have been his favorite, and the cartridge currently ranks third in Weatherby cartridge sales, after the .30-378 Weatherby Magnum and the .300 Weatherby Magnum.[2]

     

    The .257 Weatherby Magnum is among one of the flattest shooting commercial cartridges. It is capable of firing a 115 gr (7.5 g) Nosler Ballistic Tip bullet at 3,400 ft/s (1,036 m/s) generating 2,952 ft·lbf (4,002 J) of energy[3] which is comparable to factory loadings of the .30-06 Springfield and the .35 Whelen in terms of energy.

     

    Discrepancies between the metric and U.S. diameters of the bullet may cause some confusion. A .257 bullet has a metric bullet diameter of 6.53 mm. However, in Europe cartridge designation nomenclature for a large part relies on the bore diameter. As the bore diameter of the rifle is .250 inches this would make the .257 Weatherby Magnum a 6.35 mm caliber cartridge rather than a 6.5mm caliber cartridge.

  • .257 Roberts

    .257 Roberts

    257 Roberts.JPG

     

    The .257 Roberts also known as .257 Bob [2] is a medium-powered .25 caliber cartridge. It has been described as the best compromise between the low recoil and flat trajectory of smaller calibers such as the .22 and 6mm, and the strong energy but not the strong recoil of larger popular hunting calibers, such as the 7mm family and the popular .30-06.[3]

  • .250-3000 Savage

    .250-3000 Savage

    250 Savage.JPG

     

    The .250-3000 Savage is a rifle cartridge created by Charles Newton in 1915 and is also known as the .250 Savage. The name comes from its original manufacturer, Savage Arms and the fact that the original load achieved a 3000 ft/s (910 m/s) velocity with an 87 grain (5.6 g) bullet.[2]

  • .25-35 Winchester

    .25-35 Winchester

    .25-35 Winchester with .223 Rem and .308 Win.JPG

     

    The .25-35 Winchester, or WCF (Winchester Center Fire) was introduced in 1895 by Winchester for the Winchester Model 1894 lever action rifle. The case was based on the .30-30 cartridge.

  • .25-20 Winchester  

    .25-20 Winchester

    25-20 WCF.JPG

     

    The .25-20 Winchester, or WCF (Winchester center fire) was developed around 1895 for the Winchester Model 1892 lever action rifle. It was based on necking down the .32-20 Winchester. In the early 20th century, it was a popular small game and varmint round, developing around 1,460 ft/s with 86-grain bullets.

    While the SAAMI pressure rating is a full 28,000 CUP, modern ammunition is often loaded lighter in deference to the weaker steels used on many of the original guns. The early black powder cartridges were loaded to about 20,000 psi, but the SAAMI rating is close to that of the high velocity smokeless rounds produced later. The high velocity loadings developed 1,732 ft/s.[2]

    It was easy and economical to reload, and was once a favorite with farmers, ranchers, pot hunters and trappers. Though the .25-20 has been used on deer and even claimed the James Jordan Buck, a whitetail deer of long standing record in 1914,[3] it is now rarely used on large-bodied game due to its sedate ballistics and light bullet construction, which make humane one-shot kills unlikely.

    The 25-20 Winchester should not be confused with the similarly named .25-20 Single Shot; the two cartridges are markedly different and will not interchange with one another

  • .25-06 Remington

    .25-06 Remington

    25-06 Remington.JPG

     

    The .25-06 Remington had been a wildcat cartridge for half a century before being standardized by Remington in 1969. It is based on the .30-06 Springfield cartridge necked-down (case opening made narrower) to .257 caliber with no other changes. Nominal bullet diameter is 0.257 inches (6.53 mm) and bullet weights range from 75 to 120 grains (4.9 to 7.8 g).

  • .25 Winchester Super Short Magnum

    .25 Winchester Super Short Magnum

    25 WSSM cartridge comparison AR-15.jpg

     

    The .25 Winchester Super Short Magnum is a third member of the Winchester Super Short Magnum (WSSM) cartridge family created by Winchester and Browning. It is the largest caliber of the WSSM's and is the most capable of handling large game such as deer and wild boar.

  • .244 Remington

    .244 Remington

    6mm Remington.JPG

    The 6mm Remington rifle cartridge, originally introduced in 1955 by Remington Arms Company as the .244 Remington, is based on a necked down .257 Roberts cartridge using a .24/6mm bullet. Known for a combination of high velocity, long range, and accuracy, it is suitable as a dual use hunting cartridge for both varmints and medium-sized big game. When used in the less common earlier slow twist barrels, it offers exceptional range for varmint applications. While not as commercially popular today as it’s close cousin and competitor, the .243 Winchester, the 6mm Remington enjoys a slightly ballistic advantage and continues to be popular with handloaders and custom rifle builders.

  • .244 H&H Magnum

    .244 H&H Magnum

    The .244 Holland & Holland Magnum cartridge was created in 1955 in Great Britain by deerstalker and rifle-maker David Lloyd of Pipewell Hall, Northamptonshire and Glencassley in Sutherland, Scotland, and is not to be confused with the smaller-cased and much milder 6 mm (.244 in) Remington. Stalking on extremely steep deer forests such as his own at Glencassley, Lloyd was in search of a "canyon rifle" cartridge that would shoot exceptionally fast and with a very flat trajectory across deep valleys and over distances out to 300 yards (270 m) and more, to make range estimation less critical for accurate bullet placement, and to deliver a hard-hitting bullet weighing a minimum of 100 grains. The .244 H&H Magnum easily met these criteria.

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