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762 X 53 vs 762 X 54 ammo

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762 X 53 vs 762 X 54 ammo

Postby lmartin9130 » Sat Dec 27, 2014 10:39 pm

I find a lot of information on 762 X 53 vs 762 X 54 ammo but nothing definitive. Has anyone fired a 53 from a 54 ?
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Re: 762 X 53 vs 762 X 54 ammo

Postby farmerboy78 » Sat Dec 27, 2014 11:30 pm

General rule is the x53r is a .308 bore
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Re: 762 X 53 vs 762 X 54 ammo

Postby kcwomack » Mon Dec 29, 2014 2:00 am

farmerboy78 wrote:General rule is the x53r is a .308 bore

That is correct and the 54r is .311, but also the cartridge cases are different lengths. The 54r is 53.72mm and the 53r is 53.49mm. Most ammo manufactures trim their case to 53.5mm for universal fit. Lapua and 1 other manufacture (can't remember at this hour) make 53r to Finn specs, .308 x 53.49. Unless you have a Finn Mosin you really do not have to worry about it. Like most Russians the Russian Mosins witt eat any 7.62x54/53 you feed it. 8-)
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Re: 762 X 53 vs 762 X 54 ammo

Postby Shepard » Mon Dec 29, 2014 4:03 am

Differences between 7.62×53mmR (Finland) and 7.62×54mmR (Russia)
Comparison of Finnish 7.62x53R and Russian 7.62x54R cartridges

Round length: 77.00 mm (54R: 77.16)
Case length: 53.50 mm (54R: 53.72)
Rim diameter: 14.40 mm (54R: 14.48)
Bullet diameter: 7.85 mm (54R: 7.92)

The 7.62×53mmR is practically interchangeable with the 7.62×54mmR, the 54R will fit into the smallest allowed chamber size for the 53R, but is nevertheless a different cartridge made to different C.I.P. standards. Using military steel-jacketed 54R Russian ammunition in weapons made for 53R is not recommended (except the M39 and 7.62 TKIV 85 rifles designed to allow safe use of 54R in case of emergency[citation needed]), as it may rapidly wear out the barrel. Even worse, there is a possibility that the resulting pressure from the steel-jacketed larger diameter bullet is too much and firing it may result in severe damage to both the rifle and the shooter. Using the 53R in a gun made for the 54R is however safe, although it may result in accuracy well below the weapon's potential.

The Finnish commercial ammunition manufacturer Lapua does not make a difference between the 53R and 54R, but produces cartridges that will function in weapons chambered for either one.

The Russian ammunition maker Barnaul states that Russian cartridges marked 7.62×53 are the same as 7.62×54. From their web site: "Some hunters have been confused because there have been varying marking on the package, case bottom and stamps: 7.62×53: 7.62×53R: 7.62×54: 7.52×54R. This happened because the 53.72 mm case length was rounded off differently in various countries. After Russia became a member of the European Permanent Coordinated Commission, the final name - "7.62×54R" - of the cartridge was accepted. "[2]

Additionally, Russian ammunition manufacturer LVE (Novosibirsk Cartridge Plant) states, "The cartridges cal.7,62×54R are produced by various producers around the world. Producers mark these cartridges differently, and this leads to confusion among the customers – 7.62х53; 7.62×53R; 7.62х54; 7.62×54R. The confusion is based on difference in rounding out (rounding up or rounding down) the case length (case length of our cartridges is 53.65-0.2 mm). The letter "R" indicates a case rim. After Russia’s joining European Commission (ПМК) a definite name of this cartridge was determined – 7,62×54R. Therefore you may use cartridges of caliber 7.62х54R freely with your arms [marked as 7.62×53R]."[3]
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Re: 762 X 53 vs 762 X 54 ammo

Postby Just1Spark » Sun Jan 04, 2015 6:10 pm

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