Hello, and welcome to the Reloading Podcast here on the Firearms Radio Network.
Tonight the guys are talking a bit more about bolt vs semi.
What is the name of Phil’s podcast?
Hi guys,To your discussion the other day on accuracy of an AR15 vs a bolt gun. Never heard of a bench rest shooter using an AR15. I have an experiment for you all. Does the COL change when the bolt slams shut? This is the same way a bullet puller works. And if no crimp is applied will the “feed ramp” move the bullet? I hade a 6.8 spec bullet pushed back in the case. It was un crimped reduced load. I believe on a normal load (100% density) the powder would keep this from a curing. I will never load for an auto loader and not crimp. Thanks and keep up the good work. Jr.
I’m a new listener and I’m really enjoying your podcast. I started listening about a month or so ago. I started on episode 232 and have been playing catch-up and I’m now up to episode 251. At the end of episode 243 you were talking about where everyone was from. I believe it was Jim (I don’t know everyone’s name by voice yet) who said he was from Pennsylvania and moved to North Carolina. I just recently moved to Northern Virginia from Oregon and I’m having a hard time finding a good reloading shop. I don’t know if he is familiar with or knows any good shops being from the area. Any and all suggestions would be appreciated. Thanks for your time and Keep up the good work! Palm
Hello everyone and just wanted to say I’m new to the podcast, but so far you guys are doing a great job! Very useful information and great topics. I have always casted bullet then used liquid alox, but after hearing Travis give the used car lot salesmen’s speech of powder coat, I’d figure why not give it a go, so my question is when would Jim make the amazing transition from alox to powder coat? I did and I wondered why I have not started powder coating sooner! Thanks guys and keep up the good work! - Lupe from California
Cartridge corner:Cartridge corner:The 7.65×53mm Mauser (designated as the 7,65 × 53 Arg. by the C.I.P.)[2] is a first-generation smokeless powder rimless bottlenecked rifle cartridge developed for use in the Mauser Model 1889 rifle by Paul Mauser of the Mauser company. It is also known as 7.65×53mm Argentine, 7.65×53mm Argentine rimless, 7.65mm Argentine, 7.65×53mm Belgian Mauser or 7.65mm Belgian (in the United States) and 7.65×53mm Mauser (in Belgium).
The 7.65×53mmR is a rimmed variant of the 7.65×53mm Mauser cartridge.[citation needed] Ballistically it is comparable to the also-rimmed .303 British cartridge.[citation needed]
Contents
History[edit]
The 7.65×53mm Mauser was the result of considerable experimentation by Paul Mauser to optimize the bullet diameter for use with the new smokeless propellant introduced as Poudre B in the 1886 pattern 8mm Lebel that started a military rifle ammunition revolution.[3] At the time of its development it was a high-performance smokeless-powder cartridge.
This cartridge was loaded commercially by many manufacturers in the United States until about 1936.[1] Hornady is the only major U.S. ammunition manufacturer to still produce this cartridge. Sporting ammunition in this caliber is still loaded in Europe.[1] Norma, Prvi Partizan, and Fabricaciones Militares (FM) currently produce 7.65×53mm ammunition.[4] Boxer-primed cases are easily formed from .30-06 brass; resize and trim. For reloading the cartridge, use .303" British load data.
Cartridge dimensions[edit]
The 7.65×53mm Mauser has 3.70 ml (57.1 grains H2O) cartridge case capacity. The exterior shape of the case was designed to promote reliable case feeding and extraction in bolt action rifles and machine guns alike, under extreme conditions.
7.65×53mm Mauser maximum C.I.P. cartridge dimensions. All sizes in millimeters (mm).
Americans would define the shoulder angle at alpha/2 ≈ 22.2 degrees. The common rifling twist rate for this cartridge is 280 mm (1 in 11.02 in), 4 grooves, Ø lands = 7.65 mm, Ø grooves = 7.92 mm, land width = 4.20 mm and the primer type is large rifle.[2]
According to the official Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives (CIP) rulings the 7.65×53mm Mauser can handle up to 390.00 MPa (56,565 psi) Pmax piezo pressure. In CIP member countries every rifle cartridge combination has to be proofed at 125% of this maximum pressure to certify fit for sale to consumers. This means that 7.65×53mm Mauser chambered arms in CIP regulated countries are currently (2013) proof tested at 487.50 MPa (70,706 psi) PE piezo pressure.[2]
The American .308 Winchester cartridge is a close ballistic twin of the 7.65×53mm Mauser. The .308 Winchester being a post World War II cartridge developed by Winchester to provide similar performance in a short bolt action format.[citation needed]
Due to the cartridge case's dimensions, production of 7.65mm brass can be accomplished by reforming .30-06 Springfield cases. Simply resize and trim.
Military ammunition[edit]
Round-nosed 7.65×53mm Mauser ball ammunition
Spitzer 7.65×53mm Mauser ball ammunition
The original 1898 pattern military ball ammunition was introduced in the Mauser Model 1889 and loaded with a 13.65 grams (210.7 gr) round-nosed bullet fired at a muzzle velocity of 650 m/s (2,133 ft/s) with 2,884 J (2,127 ft⋅lbf) muzzle energy.
Following the lead of French and German army commands in developing the spitzer - a pointed-tip - bullet shape, later military ball ammunition was loaded with a 10.00 g (154.3 gr) spitzer bullet fired at a muzzle velocity of 830 m/s (2,723 ft/s) with 3,445 J (2,541 ft⋅lbf) muzzle energy from a 589 mm (23.2 in) long barrel became available. It had a maximum range of 3,700 m (4,046 yd).[5] Reverse engineering the trajectory from the previous sentence indicates a ballistic coefficient (G1 BC) of approximately 0.34.
After that military ball ammunition loaded with an 11.25 g (173.6 gr) spitzer bullet fired at a muzzle velocity of 725 m/s (2,379 ft/s) with 2,957 J (2,181 ft⋅lbf) muzzle energy from a 589 mm (23.2 in) long barrel became available. Besides a pointed nose this projectile also had a boat tail to further reduce drag. It had a maximum range of 5,000 m (5,468 yd).[5] Reverse engineering the trajectory from the previous sentence indicates a ballistic coefficient (G1 BC) of approximately 0.55.
Military use[edit]
At one time, the 7.65×53mm Mauser cartridge saw widespread military use. It was used by:
Chambered service weapons[edit]
Some of the Mauser rifles it was used in were the Model 1889, Model 1890, Model 1891, Model 1893, Model 1903, Model 1905, Model 1907, Model 1909, Model 1927, FN Model 1930, Vz. 32, Standardmodell 1933 and FN Model 1935. Other rifles included the Fittipaldi machine gun, Madsen machine gun and the FN Model 1949. In Argentinian military service, the cartridge was used from 1891 to the early 1970s in Mauser bolt-action military rifles, as well as a semi-automatic rifle, the FN-49, manufactured by Fabrique Nationale in Belgium.
References[edit]
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a b c Barnes, Frank C. (2006) [1965]. Skinner, Stan (ed.). Cartridges of the World(11th ed.). Iola, WI, USA: Gun Digest Books. p. 357. ISBN 0-89689-297-2.
^
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a b FN Mauser Model 98 Rifle and Carbine Operator's Manual (PDF), p. 28, archived from the original (pdf) on 2012-05-10
Ball, Robert W. D. (2011). Mauser Military Rifles of the World. Iola: Gun Digest Books. ISBN 9781440228926.
External links[edit]
Wikimedia Commons has media related to 7,65×53 mm Argentino.
The 7.65x53 and 7.65x53R page, by Chuck Hawks (accessed 2015-03-14)
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