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Factory loadings. Number of manufacturers producing complete cartridges - e.g. Norma, RWS, Hornady, Winchester, Federal, Remington, Sellier & Bellot, Prvi Partizan. May be none for obsolete and wildcat cartridges. H/R: Handgun (H) or rifle (R) - dominant usage of the cartridge (although several dual-purpose cartridges exist)
.500 Black Powder Express.500 Jeffery.500 Nitro Express.500 S&W.500 Bushwhacker.500/450 Magnum Black Powder Express.502 Thunder Sabre.505/.404 Stewart.510 Beck.577/450 Martini–Henry.577/500 Nitro Express.577/500 No 2 Black Powder Express.505 Gibbs.510 DTC Europ.510 Whisper.55 Boys.56-56 Spencer.575 Miller & Greiss; 20/577 Alexander Henry
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).
Norma was started in 1902 by three Norwegian brothers from Nordre Land, Lars Enger (1850-1917), Johan Enger (1852-1925) and Ivar Enger (1863-1942), whose company L.A.Enger & Co acquired an ammunition factory in Raufoss and later moved to Kristiania (modern day Oslo) as Norma Projektilfabrik A/S (Norma projectile factory stock company) a few years earlier in 1895.
[2] [4] Schultz & Larsen of Denmark chambered the cartridge in their bolt-action rifles. Norma manufactured commercial ammunition, but later discontinued the line. While the 7×61mm S&H proved to be popular, mostly outside of the United States , [ 1 ] it led was overshadowed once the 7mm Remington Magnum was released. [ 2 ]
DuPont at one time shipped DuPont No. 4350 powder to Norma Projektilfabrik for the reloading of Weatherby ammunition. But some time later Norma was able to source a powder with similar burn characteristics locally which was used instead of DuPont's IMR 4350. [6] Norma would later purchase the company and rename the powder Norma 204.
When firing a 9.7 g (150 gr) AccuBond Long Range bullet from a rifle with a 660 mm (26 in) barrel, the .27 Nosler has an approximately 120 m/s (400 ft/s) advantage over the .270 Winchester, about a 90 m/s (300 ft/s) advantage over the .270 WSM, and about a 30–46 m/s (100–150 ft/s) velocity advantage over the .270 Weatherby. The primary use ...
The .300 Norma Magnum, also known as .300 NM or 300 Norma, is a centerfire magnum rifle cartridge developed by Swedish ammunition manufacturer Norma Precision.The .300 Norma Magnum uses a .338 Norma Magnum parent case necked down to .30 caliber, [1] named to differentiate it from the older .308 Norma Magnum designed in 1960, and has begun to gain popularity among long-range shooters.