.416 Rigby

Infobox Firearm Cartridge
name= .416 Rigby


caption=
origin= England
type= Rifle/Dangerous Game
service=
used_by=
wars=
designer= John Rigby & Company
design_date=1911
manufacturer=
production_date=
number=
variants=
is_SI_specs=yes
parent=
case_type=Rimless, bottleneck
bullet=10.57
neck=11.33
shoulder=13.72
base=14.96
rim_dia=14.99
rim_thick=1.65
case_length=73.66
length=95.25
case_capacity=8.28
rifling=420 mm (1-16.5 in)
max_pressure=325.00
max_cup=
primer=Large rifle magnum
is_SI_ballistics=
bw1=350
btype1=Barnes TSX
vel1=2612
en1=5304
bw2=400
btype2=Barnes Solid
vel2=2515
en2=5619
bw3=450
btype3=Woodleigh
vel3=2286
en3=5223
bw4=
btype4=
vel4=
en4=
bw5=
btype5=
vel5=
en5=
test_barrel_length=26"
balsrc= Reloaders Nest [http://www.reloadersnest.com/frontpage.asp?CaliberID=88 .416 Rigby data from Reloaders Nest] ]

The .416 Rigby or 10.6x74 was first manufactured in 1911 by the British Rigby rifle and ammunition-making company. It was the first .416 rifle caliber, and rifles were built on magnum-length 1898 Mauser actions.

The British who designed the .416 Rigby made it on a large cartridge case for a reason. The .416 Rigby is an enormous round by American standards, but when the British brought it out they designed it, like many of their big game cartridges, as a very powerful but low-pressure cartridge. This was done to accommodate the hot climates of India and Africa. In very hot conditions, brass cartridge cases have a tendency to stick in rifle chambers after firing because chamber pressure becomes too high, and a stuck case will jam the gun. A jam could be fatal if a lion, tiger, rhino, or other potentially charging beast was near by. The huge cartridge case allows the .416 Rigby to give good performance while keeping chamber pressure down.

Most .416 Rigby factory-loaded ammunition pushes a 400 grain bullet in the neighborhood of 2,300 feet per second (700 m/s). Additionally, it doesn't have the tremendous recoil of other large cartridges such as the .460 Weatherby Magnum. Recently-offered lighter-weight bullets, affordable reloading brass, and reasonably priced American and imported rifles have made this caliber increasingly popular for hunting large game in the United States.

The fairly modern .460 Weatherby Magnum is based on a belted version of the older .416 Rigby case, but is loaded to far higher pressures. The .416 Remington Magnum, using a much smaller case, will equal the veteran .416 Rigby in performance, again thanks to higher pressure.

Until recently, the use of .416 cartridges was mostly confined to Africa, where they were used primarily on dangerous or "thick-skinned" large game such as rhino, elephant and Cape buffalo. [http://www.chuckhawks.com/416.htm The .416 Rigby and .416 Remington Magnum by Chuck Hawks] ]

ee also

* .416 Weatherby Magnum
* List of rifle cartridges
* 10 mm caliber

References

* [http://www.johnrigbyandco.com John Rigby & Co.]
* C.I.P. decisions, texts and tables ( [http://www.cip-bp.org/index.php?id=tdcc-telechargement free current C.I.P. CD-ROM version download (ZIP and RAR format)] )