History and origins
As formerDesign and specifications
In designing the .416 Remington Magnum, Remington intended to emulate the performance of the .416 Rigby using the smaller case of the .375 H&H Magnum. To be able to reach this performance level, the smaller case would have to work at much higher pressures than the Rigby cartridge. However, the volume of the resulting case allowed for Remington to achieve the anticipated performance level rather easily without reaching its maximum pressure limit. Remington chose to use the 8 mm Remington Magnum as a starting point when developing the new cartridge. The 8 mm Remington Magnum used a highly improved and strengthened case in comparison to the .375 H&H Magnum and it offered an increase in volume over the latter cartridge. Furthermore, the SAAMI working pressure of the 8 mm Remington Magnum's case was which was higher than that of the .375 H&H Magnum. In the end .416 Remington Magnum was created by simply necking up the 8 mm Remington Magnum case with no other changes made to the case. Dimensionally, below the neck, the cases of both the 8 mm Remington Magnum and the .416 Remington Magnum are identical. : :S.A.A.M.I. compliant .416 Remington Magnum cartridge schematic: All dimensions in inches illimeters The .416 Remington Magnum was standardized in May 1989 by S.A.A.M.I. in North America. SAAMI recommends a 6 groove barrel with each groove having a width of and twist rate of one revolution in . Recommended bore diameter is while the groove diameter is given as . The case has a capacity of 107 gr. of water (6.95 cm3). Maximum pressure given by SAAMI is or 54,000 C.U.P. The C.I.P. regulates the .416 Remington Magnum cartridge. No discrepancies exist between C.I.P. and S.A.A.M.I. published values regarding case dimensions; any discrepancies that may exist are due to rounding off when converting from inches to millimeters. However, the CIP provides a pressure rating of for the cartridge. The C.U.P. pressure rating is the same as the S.A.A.M.I. pressure rating of 54,000 C.U.P.Performance
The .416 Remington Magnum was designed to emulate the performance of the .416 Rigby and by all evidence meets this design criterion. When loaded to within the pressure specification stipulated by SAAMI and the CIP, the cartridge can easily exceed this design criterion by about . Held to within the respective pressure limits imposed on each of the cartridges by these organizations, the Rigby cartridge has little to no advantage in performance over the .416 Remington Magnum. In fact, to match the .416 Remington at its maximum pressure mandated by the CIP of the .416 Rigby cartridge will require to be loaded to exceeding the maximum pressure by . Factory manufactured ammunition for both these cartridges launch a bullet at while handloaded ammunition is able to drive the same bullet at about . When Ruger entered the .416 caliber (10.36 mm) fray, they did so with a cartridge shorter but internally fatter than the .416 Remington Magnum which was based on their .375 Ruger necked up to . The cartridge was a co-development between Ruger and Hornady where Ruger developed the rifles and Hornady the ammunition. Compared to the .416 Ruger, the Remington cartridge has a greater case capacity and a higher S.A.A.M.I. recommended pressure level. This means that the Remington cartridge should perform better than the Ruger cartridge. The Hornady's .416 Ruger ammunition matches both the Rigby and Remington .416 cartridges it does so working close to its maximum pressure level using a specially blended powder unavailable to the public. Those who handload their ammunition will have some difficulty reaching the performance of the factory loaded ammunition while staying within the maximum average pressure rating of the cartridge. Data published by Hornady provide a velocity for the of for the .416 Ruger, for the Rigby, for the .416 Remington Magnum and for the .416 Weatherby. The .416 Weatherby Magnum on the other hand is capable of a greater performance level than either the Remington, Rigby or Ruger cartridges. Factory ammunition is loaded to with the bullet. The .416 Weatherby Magnum uses a slighter more voluminous case than the Rigby cartridge and works at a higher C.I.P. pressure than the .416 Remington Magnum. The .416 Dakota uses a modified Rigby case and is able to attain using better quality brass than the Rigby cartridge at a higher pressure. Factory loaded ammunition generates of energy at the muzzle. This exceeds the energy generated by most .458 Winchester Magnum factory ammunition which launch a bullet at . Many experienced African hunters consider the .416 Remington a more flexible cartridge than the .458 Winchester Magnum. : It is evident that the .416 Remington Magnum is a ballistically superior cartridge to the .458 Winchester Magnum and has a trajectory close to that of the .375 H&H Magnum. While the .458 Winchester Magnum retains to about the the .416 Remington Magnum carries that energy level beyond the mark. The cartridge is flatter shooting than the .458 Winchester Magnum. When zeroed for the .416 Remington Magnum drops about at and will be about low at . The .458 Winchester Magnum in contrast will be low at and low at . This ability to retain a usable energy level to farther ranges makes the .416 a far more flexible cartridge and therefore a more useful cartridge than the .458 Winchester Magnum. As with any big bore rifle cartridge recoil is a consideration. In a the .416 Remington Magnum will generate about of recoil energy at velocity of . In comparison, a .458 Winchester Magnum firing a bullet at will generate about of recoil energy at velocity of in a similar weighted rifle.Sporting use
The intent and purpose behind the .416 Remington Magnum cartridge was to provide a dangerous game rifle cartridge which could emulate the performance of the vaunted .416 Rigby cartridge. While the .375 H&H Magnum is considered marginal on heavy, dangerous game, the .416 Rigby was recognized as a big bore with definitive stopping power to put downRifles
When the .416 Remington Magnum was released to the public in 1989 it was available in three Remington Model 700 Safari rifle models including the then just released Model 700 Safari KS rifle. Today, Remington no longer offers the .416 Remington as an over the counter chambering but rather through the Remington Custom Shop. When the Model 700 Safari KS was relegated to the Remington Custom Shop, Remington continued offer the .416 Remington Magnum in this rifle model but dropped the two walnut stocked rifles in this chambering. Since then, Remington has discontinued to the .416 Remington Magnum in the Safari KS model and instead switched to the Hunter Series Model 700 ABG (African Big Game) Rifle which sports a wood laminate stock. This is the only current rifle which is available from Remington which is offered in this cartridge and is only available from the custom shop. In 1994 the Winchester Model 70 returned to an updated version of the Pre-'64 type action featuring controlled round feed, full length claw extractor, fixed-type ejection and chambered the Super Express version (introduced in 1990 with the Post-'64 push feed action in 375 H&H Magnum, and .458 Winchester Magnum) in .416 Remington Magnum. In 2010 Winchester introduced the Model 70 Safari Express, manufactured (starting in 2008) for Winchester by Fabrique Nationale in Columbia, South Carolina that also featured the Pre-'64 type action and MOA Trigger, chambered in .375 H&H Magnum, .458 Winchester Magnum, and the .416 Remington Magnum. Mauser continues to offer the M03 Magnum rifle chambered for the cartridge. For those wanting an authentic Mauser 98 action type, Dumoulin Herstal chambers the cartridge in their Herstal Safari rifle. A-Square offers the Hannibal (right-handed) and Caesar (left-handed) rifles in the .416 Remington. The A-Square rifles are based on the P-14 Enfield design. Apart from these manufacturers several custom gunsmiths offer rifles chambered for this cartridge. TheAmmunition
The bullet at is the industry performance standard for the .416 Remington Magnum. Very few ammunition manufacturers offer bullet weights other than the bullet. Currently Conley Precision, Double Tap, Federal, Hornady, Norma, Remington and Winchester produce ammunition for rifles chambered for this cartridge. Currently only Conley Precision, Double Tap and Norma produce ammunition loaded with bullet weighing something other than . However, the ammunition produced by these companies are generally available only through mail order (Conley Precision) or not commonly found throughout North America (Norma and Double Tap). Federal provides five loaded cartridges in their Federal Premium line loaded with Barnes, Swift and Trophy Bonded bullets. Hornady offers a solid (DGS) and a controlled expansion bullet (DGX) as ammunition for the .416 Remington Magnum. Norma offers a solid and soft point ammunition loaded with Woodleigh bullets at in their PH line of ammunition. Remington offers a single load topped with a Swift A-Frame bullet while Winchester offers two loads in their Safari ammunition line using Nosler's Solid and Partition bullets. Double Tap offers four loads, a and Banes TSX bullets at and respectively, a Nosler Partition at and a Woodleigh Weldcore at .Criticism
The .416 Remington Magnum has often been criticized for operating at higher pressures than the .416 Rigby and these high pressures can cause difficulty in extracting spent casings in hot tropical environments. However, such claims appear to be speculative and remain for a large part unfounded. While the cartridge is loaded to higher pressures than the .416 Rigby, Remington loads the cartridge to lower than the maximum stipulated pressure level for the cartridge. Although the .416 Remington brass is known for its strength, Rigby brass quality varies from manufacturer to manufacturer and designed for the moderate working pressure of the Rigby cartridge as stipulate by the CIP and SAAMI. Furthermore, modern smokeless powders are insensitive to ambient temperatures and are stable throughout the working temperature range. The Rigby cartridge had been designed for use with cordite, hence the large case volume and lower working pressures. Furthermore, cordite was highly sensitive to temperatures which gave rise to high pressures in the high ambient temperature environment of Africa and India. The Remington cartridge has always been loaded with modern smokeless powders, however, that is not true of the .416 Rigby which was originally loaded with cordite. Since cordite is temperature sensitive the Rigby cartridge was loaded to lower pressure levels. .Variants
The .416 Hoffman uses an improved .375 H&H case necked up to accept a .416 inch bullet. The Hoffman cartridge is slightly larger than the .416 Remington Magnum in the neck and shoulder area and has a less taper. The Hoffman cartridge has a case capacity of 109.5 gr. of water (7.11 cm3), about 2% greater than that of the .416 Remington Magnum. Consequently, a rifle which is chambered for the .416 Hoffman can fire a .416 Remington Magnum cartridge but not vice versa. The .416 Hoffman had been adopted by A-Square as a proprietary cartridge but later discontinued. The cartridge can be considered an improved .416 Remington Magnum if it had not predated the Remington cartridge by over a decade.See also
* .416 Rigby * .416 Ruger * .416 Taylor * .416 Weatherby Magnum * 10 mm caliber *References
External links