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On this day

30. June 1643

Slaget ved Adwalton Moor sto ved Birkenshaw i Yorkshire under den første fasen av den engelske borgerkrigen.... Read more ...

Yesterday

29. June 1194

Kong Sverre ble norsk konge


30. June 1643

Rojalistene seiret ved Adwalton Moor
Slaget ved Adwalton Moor sto ved Birkenshaw i Yorkshire under den første fasen av den engelske borgerkrigen. Rojalistene under William Cavendish, hertug av Newcastle, som hadde en mer enn dobbelt så stor styrke som parlamentarianerne under Ferdinando Fairfax, 2. baron av Cameron, seiret i slaget. Dette medførte at rojalistene kontrollerte det meste av Yorkshire.

29. June 1194


Kong Sverre ble norsk konge
Kong Sverre ble kronet til konge av Norge. Sverre ble født i Norge, men vokste opp i Kirkjubøur på Færøyene. Han må ha vært spesielt evnerik siden Roe, biskopen på Færøyene, satte ham i prestelære. Ifølge sagaen skal Sverre ha fått høre av mor si, Gunnhild, at han var sønn av kong Sigurd Munn. Dette regnes i dag som lite troverdig. Statusen som «kongssønn» ga imidlertid Sverre legitimitet til et mer storstilt prosjekt enn en karriere innen kirken. Han tok kontakt med den ledende opprørsflokken i landet, kalt birkebeinerne. Disse stod uten høvding etter at Øystein Møyla hadde falt i slaget på Re. De tok Sverre til høvding og han viste seg raskt som en taktisk dyktig hærfører.

I løpet av kort tid greide han å få seg selv hyllet som konge på Øyratinget, men det tok flere år før kongemakten endelig var sikret. De første årene var Sverre og birkebeinerne konstant i bevegelse. Flokken ble sett på som uromakere av allmuen og det var få som trodde de hadde noen sjanse til seier.

Motstanderen var kong Magnus Erlingsson og hans far, Erling Skakke. Magnus var dattersønn til Sigurd Jorsalfare og ble støttet av kirken, som ønsket en kontrollert arvefølge bygd på ektefødsler. Da Magnus døde i slaget ved Fimreite stod biskopene Nikolas Arnesson (Oslo) og Eirik Ivarsson (Stavanger, senere erkebiskop av Nidaros) fram som Sverres argeste motstandere. De reiste sin egen krigerflokk (baglerne) og greide å få paven til å lyse kong Sverre i bann i 1194.

Striden med baglerne varte til Sverre døde på sotteseng i Bjørgvin (i dag Bergen) i 1202. Med en alder på om lag 50 år var han en av de norske kongene som levde lengst fram til da.


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    Rifle musket and Minié Ball

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    The rifle musket was a common weapon during the Crimean War and the American Civil War. If treated right, the rifle musket can be an extremely accurate weapon. One of the bullets that were used in the rifle musket was called the minié ball. Read more about the rifle musket and miné ball in this article.

The Jarmann rifle - Part 1 - Background history

Category: Black powder cartridge
Published: 11. September 2008 by Øyvind Flatnes.
Edited: 12. September 2008.
Views: 11978

Carl Gustaf Jarmann

Norway was one of the first countries in the world, perhaps even the first, which adopted a repeating bolt action rifle for the armed forces. The rifle was invented by the Norwegian engineer Jacob Smith Jarmann, and was adopted in 1884. However, the Jarmann rifle was not the first magazine rifle that had been in use in by the military in Norway. The navy had used the rather clumpy Krag-Petersson rifle since 1876, but with this rifle the shooter had to help with the fingers to manually load a new cartridge in the chamber. The Krag-Petersson rifle used the same rimfire ammunition as the 12 mm Remington rolling block rifle.

Find out more!
You can read more about the Norwegian Jarmann and Krag-Petersson, as well as other early military repeating black powder rifles in the brand new book From Musket to Metallic Cartridge: A Practical History of Black Powder Firearms.

Jarmann

Jarmann rifle assembled from
original parts.

The Jarmann rifle was originally a single shot rifle, and this weapon was issued to troops for trial purposes as early as 1878. The model designations that are used for the Jarmann rifle may be a bit confusing. The Jarmann rifle with a fixed tubular magazine under the barrel was actually adopted in 1881, but it wasn't until an adoption in 1884 that the formal basis for the rifles model designation was created. The first model is therefore called M/1884. The M/1884 was improved in 1887 with 15 minor changes, and because of this there is a model which is called M/1887. Other minor changes were adopted in 1888, 1889 and 1890.

The Jarmann rifle can be used as both a single shot and repeating rifle. You can switch from single shot to repeating mode, or the other way around, by turning the fire selector on the left side of the barrel 180 degrees forward or backwards. The repeating action works in the following way: A coil spring pushes the cartridges backwards in the tubular magazine. When the bolt is moved backwards the empty cartridge is extracted from the chamber. At the same time the cartridge elevator is lowered and a new cartridge is forced onto the elevator by the coil spring in the magazine. When the bolt is moved forward the elevator lifts the cartridge is lifted by the elevator and when the bolt hits the cartridge base it is pushed into the chamber.

Today the Jarmann rifle is extremely rare despite the fact that about 30 000 of them were made in Norway and 1500 in Sweden. Where they all have disappeared no one seems to have the exact answer, but a large amount was destroyed by the Nazis during the World War II occupation. A great deal was also converted to harpoon guns (rescue guns). The civilian market was not very interested in the Jarmann rifle when the armed forces tried to sell them when they were obsolete. One of the main reasons was that it was hopelessly inferior to the new Krag-Jørgensen rifle.

Jarmann Jarmann

The pictures show the fire selector that allows the shooter to switch between single shot and repeating fire.
On the picture to the left single shot is selected, while on the picture to the right repeating fire is selected.



Jarmann Jarmann Jarmann

The picture series above shows how the repeating mechanism works. When the bolt is moved backwards a new cartridge is forced onto the cartridge elevator by the coil spring in the magazine (picture 1). When the bolt is moved forward the cartridge is lifted by the elevator (picture 2), and the cartridge is inserted into the chamber (picture 3).

The ammunition

The magazine could take eight centre-fire bottleneck cartridges. The ammunition went through several changes:

1878:

The ammunition of 1878 was initially meant for the Jarmann single shot rifle. The lead bullet weighed 21.85 grams (337 grains), and the diameter was 10.03 mm before patching. After patching the diameter was increased to 10.30 mm. The load was 4.46 grams (68.8 grains) of black powder.

The modified cartridge

After the transition from single-shot rifle to repeating rifle it became clear that the muzzle velocity of 474.5 m/s dropped to 465.5 m/s measured 25 alen from the muzzle. It was therefore decided to increase the load to 5 grams (77.1 grams) in 1883 and later to 5.1 grams (78.7 grains) in 1885.

When it was complained that the paper stuck to the bullet and ruined the accuracy extensive ammunition trials were started. The construction committee of 1889 writes that:

'With wads of carton and wax-turpentine wads, in addition to vaseline (petroleum jelly) on the projectile we have during the last trials gotten so good results that the construction committee in accordance with the gun commission's observations suggests that:

1. The wad is to consist of a carton directly on top of the powder, and on top of that a 3.5 to 4.8 mm thick wad consisting of 3 parts wax and 2 parts turpentine.

2. That the projectile is given a coat of melted vaseline grease of which the temperature is not to exceed 85° C. The plane section of the bullet is to be wiped free of grease.

3. It is instituted inquiries of the ammunition of the sort mentioned above after it has been stored a longer period of time, for example, one year.

The commission is aware that the above mentioned suggested wad and grease may not guarantee that the paper in the future will follow the projectile and cause irregularities in the trajectory, but as these irregularities have occurred on distances over 1000 metres, and that our trials seems to show that it these days is not possible to achieve better results, we find it not adequate to perform more trials. Accuracy on the greater distances that suits these days demands is probably only achievable with metal jacketed bullets'

Transition to smokeless powder

Jarmann cartridge Metal jacketed bullets were introduced in 1893 and at that time the black powder load was replaced with a load of smokeless ballistite powder. This increased the muzzle velocity to 490-510 m/s measured 25 metres from the muzzle. This resulted in a flatter trajectory, but the sight settings did not fit the new trajectory. The sight settings were never fixed, probably because the Krag-Jørgensen rifle was on its way to replace the Jarmann rifle. The diameter of the metal jacketed bullet was 10.4 mm.

The picture above (top right) shows an original calibre 10.15 x 61 Jarmann cartridge loaded with ballistite powder and a steel jacketed bullet.

Part two of this article will deal with the practical use of the Jarmann rifle.