6.5 × 50 mm rear

6.5 × 50 mm rear
general information
caliber	6.5 × 50 mm HR, 6.5 x 51 R (Arisaka)
Sleeve shape	Half rim cartridge
Dimensions
Sleeve neck ⌀	7.37 mm
Floor ⌀	6.63 mm
Cartridge bottom ⌀	12.08 mm
Sleeve length	51.00 mm
Cartridge length	76.00 mm
Weights
Bullet weight	9.0 g
Powder weight	2.5 g
Technical specifications
Speed ​​v 0	770 m / s
Max. Gas pressure	2950 bar
Bullet energy E 0	2625 J.
Lists on the subject

The 6.5 × 50 mm HR is a Japanese rifle cartridge that is known by a number of names.

description

The 6.5 × 50 mm HR is a half-rim cartridge with a bottle-shaped case and a relatively long projectile. Its total length corresponds roughly to the Russian 7.62 × 54 mm R and is only slightly shorter than the German 7.92 × 57 mm , although the case is significantly shorter than its case. The cartridge is provided with Berdanz primer .

Synonyms

The 6.5 × 50 mm HR (HR for half rim) cartridge is known internationally under a number of names. Below is an overview of the known names:

• 6.5 × 50 mm HR ↔ 6.5 x 51 (Arisaka) ↔ 6.5 x 50 Arisaka ↔ 6.5 x Japanese ↔ 6.5 x 50 Japanese Arisaka ↔ 256 Jap. Arisaka ↔ 256 Ball ↔ DWM 481

development

The cartridge was developed at the end of the 19th century for the Type 30 Arisaka rifle of the Imperial Japanese Army . It replaced the outdated 8 × 52 mm cartridge of the Murata rifle.

The original cartridges had round-head bullets weighing 10 grams and were loaded with 2.0 grams of low-smoke powder. With the introduction of the Type 38 rifle in 1905, the cartridge was fitted with a pointed bullet and loaded with 2.5 g of powder, referred to as the M38. This development corresponds to that of various European cartridges (e.g. 7.92 × 57 mm, 7.62 × 54 mm R). In 1922, the army introduced the Type 11 machine gun .

commitment

In 1897 the Type 30 Arisaka rifle with the 6.5 mm cartridge became an orderly. In 1902 the Navy took over the cartridge for its Type 35 rifle. In 1905 the cartridge was the standard cartridge of the Imperial Army and Navy and the Type 38 rifle was developed for this ammunition. In 1911 the cavalry followed with the Type 44 carbine.

Russo-Japanese War 1905

The cartridge served as an orderly cartridge during the Russo-Japanese War and proved itself together with the Type 30.

First and Second World War

The 6.5 × 50 mm HR was also the standard cartridge for the Japanese armed forces during the First World War , as was the case during the Second World War .

Russia

During the Russo-Japanese War, Russia captured a number of Type 38 rifles and large quantities of ammunition, which were given to its own troops. During the First World War, more were bought by Japan. Later, the 6.5 × 50 mm HR cartridge, which was available in large quantities , was used as standard in the first Russian self-loading rifle , the Automat Fyodorov .

In November 1915 Russia ordered 45 million Mk II cartridges per month in Great Britain , which from March 1916 wanted to deliver 15 million units and increase production to the required 45 million by May 1916. A total of 558,947,000 round-head cartridges were delivered to Russia.

Great Britain

In 1914, Great Britain bought around 150,000 (according to other sources 130,000) rifles with the associated ammunition, which were used for training purposes, home defense, in the Royal Navy and in the fight against the Ottoman Empire . The older round-head bullet was manufactured in Great Britain as the .256-inch (6.5 mm) caliber Mk II from 1917 , while the M38 with the pointed bullet was designated as the Mk I. During the Russian Civil War , Britain supplied most of these weapons to the whites . Exercise cartridges were also made in Great Britain.

Finland

Finland , as part of the Russian Empire , inherited some of the weapons after its disintegration and used them as long as their wear and tear permitted.

Web links

Commons : 6.5 × 50 mm HR  - collection of images, videos and audio files

• Chuck Hawks: 6.5x50mm SR Arisaka. In: milpas.cc. 2002, accessed June 3, 2015

Individual evidence

1. ↑ CIP 6.5 x 51 R (Arisaka) (PDF, 22.5 kB) ( Memento from August 26, 2019 in the Internet Archive )
2. ↑ CIP list of synonymous calibers, page 8, (status 2001, online PDF) ( Memento from August 26, 2019 in the Internet Archive )
3. ↑ ^{a b} .256 inch Arisaka Ball. In: British Military Small Arms Ammo. Retrieved June 3, 2015 . 
4. ↑ ^{a b} Chuck Hawks: 6.5x50mm SR Arisaka. (No longer available online.) In: milpas.cc. 2002, archived from the original on June 4, 2015 ; accessed on June 3, 2015 . 
5. ^ ^{A b} Anthony G. Williams: The. 256 inch British. A lost opportunity. In: quarryhs.co.uk. September 25, 2010, accessed June 3, 2015 . 
6. ↑ .256 Arisaka Drill. In: British Military Small Arms Ammo. Retrieved June 3, 2015 .