30-03-2007, 12:51 AM
Angående hastigheder har jeg fundet dette på nettet.
CENTERFIRE RIFLE VELOCITY VS. BARREL LENGTH
Muzzle Velocity Range (ft./sec.) - Approx. Change in Muzzle Velocity per 1" Change in Barrel Length (ft./sec.)
2000-2500 10
2500-3000 20
3000-3500 30
3500-4000 40
1. Determine how much shorter, or longer, your barrel is than the test barrel.
2. In the left column of the above table, select the muzzle-velocity class of your cartridge.
3. To the right of that class, read the approximate change in velocity per inch of barrel length.
4. Multiply this number by the difference in the length of your barrel from that of the test barrel.
5. If your barrel is shorter that the test barrel, subtract this figure from the muzzle velocity shown for your cartridge.
6. If your barrel is longer, add this figure to the muzzle velocity shown.
Håber det kan bruges
Mvh Søren
CENTERFIRE RIFLE VELOCITY VS. BARREL LENGTH
Muzzle Velocity Range (ft./sec.) - Approx. Change in Muzzle Velocity per 1" Change in Barrel Length (ft./sec.)
2000-2500 10
2500-3000 20
3000-3500 30
3500-4000 40
1. Determine how much shorter, or longer, your barrel is than the test barrel.
2. In the left column of the above table, select the muzzle-velocity class of your cartridge.
3. To the right of that class, read the approximate change in velocity per inch of barrel length.
4. Multiply this number by the difference in the length of your barrel from that of the test barrel.
5. If your barrel is shorter that the test barrel, subtract this figure from the muzzle velocity shown for your cartridge.
6. If your barrel is longer, add this figure to the muzzle velocity shown.
Håber det kan bruges
Mvh Søren