På ordre fra president Abraham Lincoln begynte Nordstatshæren under general Irvin McDowell en marsj på 25 miles mot Virginia. Feltarmeen som marsjerte ut fra Washington var den største som noen gang var samlet i Nord-Amerika, og besto av rundt... Read more ...
Nordstatshæren marsjerte mot Virginia
På ordre fra president Abraham Lincoln begynte Nordstatshæren under general Irvin McDowell en marsj på 25 miles mot Virginia. Feltarmeen som marsjerte ut fra Washington var den største som noen gang var samlet i Nord-Amerika, og besto av rundt 35 000 menn. Marsjen kulminerte i det første slaget ved Bull Run, som var det første landslaget av betydning i den amerikanske borgerkrigen. Hadde Nordstatene vunnet slaget kunne krigen blitt kortvarig, men Sørstatene vant og fortsatte kampen i fire lange år.
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The 10.15 x 61 cartridge for which the Jarmann rifle was chambered for was also used in numerous civilian firearms, for example, rifles made by Lars Hansen Hagen and Hans Larsen. This article deals with the reloading and shooting of the Jarmann rifle and the 10,15 x 61 cartridge.
Published: 19 September 2008 by Øyvind Flatnes.
Edited: 19 September 2008.
A precondition for good accuracy with minié bullets are properly dimensioned bullets that fit the barrel. Many .58 calibre bullet moulds have a .575" diameter, while the bore diameter of many muskets is .580 or more. Bullet moulds also have a tendency to cast smaller bullets than specified on the mould. Be aware that muskets that have progressive depth rifling may shoot better with under dimensioned bullets compared to muskets with ordinary rifling.
Cut away view of minié ball
You don't have to have custom bullet moulds made to fit your musket. If you have an undersize bullet mould they can be enlarged quite easily. You don't need sophisticated tools either. Note that the following applies to steel and brass moulds. I'm uncertain whether it is possible to enlarge an aluminium mould. You need the following equipment to enlarge a mould:
- A hand drill
- Fine grit valve grinding compound
- Brass or steel wood screws
- A file
- 4-5 perfect minié balls cast from the mould you are going to enlarge
- A vernier calliper or micrometer
Find out more!
You can learn more about bullet moulds and bullet casting in the brand new book From Musket to Metallic Cartridge: A Practical History of Black Powder Firearms.
Before you start
There are basically two ways to find out whether your bullet has correct diameter: with or without micrometer/calliper. I recommend using the micrometer/calliper method, but if you don't have any you can use the other method.With a micrometer or vernier calliper
Slug the barrel of the musket that shoots the bullet from the bullet mould you plan to enlarge. When you slug it you must remove the breech plug, which is a job for the advanced. When the breech plug is removed you force an oversize lead slug through the barrel. Force the slug from the breech towards the muzzle. When the slug exits the muzzle it has a perfect print of the rifling. Use your measuring tool to measure the bore diameter (diameter across the flats). Remember, that on a slug the bore diameter is the smallest diameter and the larges diameter is the rifling depth. If your musket is .58 calibre you will probably find that the diameter is about .58". Afterwards you measure the diameter of the bullet you are going to shoot. If the diameter is below .578" in a .580" barrel it may be smart to enlarge the bullet mould slightly.Without micrometer or calliper
Take a perfect cast bullet and insert it into the muzzle of the weapon you are shooting. The weapon should be wiped clean and free of oil. Insert the entire bearing surface of the bullet into the muzzle and wiggle it a bit. Does it feel loose? If it does feel loose you should enlarge it. I really recommend that you use the first method as this is more accurate. With some sort of measuring device it is easier to avoid enlarging the bullet too much.
Enlarging the bullet mould