Tag Archives: muzzleloading

17 simple rules of percussion revolver accuracy

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  1. Always do everything the same way.

  2. While developing your load change only one element one time.

  3. Limit your load to the lightest possible still giving a tight group.

  4. Use corn meal filler to lift the ball to the level of the mouth of the chamber.

  5. Use the same volume of corn meal in all the chambers.

  6. Slug your bore and use a ball matching the groove to groove diameter of your bore.

  7. Slug your chambers: it should size the ball close to your groove to groove diameter.

  8. Slug all your chambers: all chambers must have the same diameter.

  9. Check the gap between the barrel breach and cylinder at all the six positions. The size of the gap is secondary. Primary it must be the same at every chamber.

  10. Check the size of the vent holes in the nipples frequently. Change the nipples when the hole is enlarged by 0.1 mm.

  11. Always apply the same force when ramming the ball in place.

  12. Check if your bore is perfectly in line with your chambers.

  13. Use good quality soft lubrication on the balls.

  14. Apply always the same amount of grease.

  15. Use only clean burning good quality black powder.

  16. Weight your bullets and powder charges as well with 0.1 grain accuracy.

  17. If you shoot an open top revolver check if the cylinder axis is not loose, it fits perfectly in the hole on the barrel assembly. Check the wedge after each shot, to have the same gap between the cylinder and barrel breach each time.

The vampire hunters’ pistol

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Now this is something interesting we have hidden in the most secret drawer of the Boss. This pistol is for you if you are travelling to Transylvania. Just don’t forget to check the local gun laws, and hunting season for vampires. ­čÖé

 

The caliber is .45, the barrel is rifled for looooong range accuracy. Equipped with an underhammer percussion lock for fast and reliable ignition. Silver bullets and onion are not included. ­čśë

The easiest method to choose the right patch for your round ball rifle

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The patching material is the key to be accurate with a round ball load. A good patch is made of good quality, dense natural material. You can buy good quality patches in your local blackpowder shop, but you can also make your own. Which ever you choose, keep in mind a few things:

  1. You must have a tight patch-ball combination

  2. It is easy to determinate the minimum thickness of the material: If your bore measures .50ÔÇŁ between the lands, and your ball measures .49ÔÇŁ the difference is .01ÔÇŁ. This leaves .005ÔÇŁ on both sides of the bullet. This seems to be your minimal patch thickness, but in fact it is not. The patching material must make a gas tight seal, so you need to fill the grooves as well with your patch. S add the depth of the grooves as well, and there you go, you have something to start with. In this case the right thickness should be around .014-.016ÔÇŁ.

  3. Lubricate you patches. If you are using clean burning powders like the Swiss, the good old spit-patch will work. If you use one of the dirtier powders melt 1 parts of beeswax and 8 parts of tallow in a pot. Dip your patches and let them cool.

  4. Choose the right patch size that can cover your ball completely.

  5. Learn to read your patches. Collect them after they are shot. A gas tight seal is indicated with a complete circle of blackpowder residue drawing also the from of the grooves. The edges of the patch must not disintegrate too much, and it must not tear or perforate.

To decide weather you can shoot roundballs from your rifle accurately or not you have to know the rifle twist of the bore. This number gives you the distance where the spiral of the grooves makes one complete turn. The faster your twist is, the better it is for conicals. You can shoot roundballs from a fast twist barrel, but you will have to reduce the powder load dramatically or the ball will simply jump the rifling without turning with the spiral. Knowing the rate of twist is important, but often not enough. You must check your rifling profile as well. The gunsmithes of old times knew what the differences were: the patch round ball riflings were deeper, and the edges of the lands were rounded to save the patch from cutting. The number of grooves was also greater than the riflings for conical bullets.

Roundballs are versatile projectiles, they are capable of remarkable accuracy. The will work well for target shooting and hunting. But if you plan to hunt, don’t forget to limit your range to maximum 50 meters.