Thread: Short fatties vs long slender ones...

Greetings HandH,
Yes you made your point clearly. Most barrels are measured to the bolt face for convenience. If you think of a projectile as a rocket sitting on a ramp it might help. The rocket motor provided an amount of thrust similar to the pressure behind the projectile. thrust/ pressure is the same the rocket will accelerate at the same rate and achieve the same velocity at the same distance from the start. If we now go back to our projectile the barrel is our launch ramp and the length of travel of the projectile determines the velocity provided everything else is the same. The devil is in those last five words. With John and Charlie's test the length of the barrel to the base of projectile was the same and the velocities with some loads were near identical. With other loads they were not. In practical terms it matters little how barrels are measured as the difference in velocity is miniscule. Still something for the anal to ponder over though.
Regards Grandpamac.