[tanman83]

Sorry About the spelling i am not sure how to velcitioy is MV Faster out a shorter barrell Or A longer one just A ? Need Awnsers

 

[Rugerfan0374]

The correct spelling is Velocity. ( not trying to make you feel bad or anything)

Usually a longer barrel will generate more velocity. As the pressure builds ( once you have pulled the trigger) the pressure builds just a bit longer in longer barrels, therefore generating just a bit more velocity. Now sometimes it won't be much, depending on the caliber, bullet weight and powder charge it could be as little as 20 feet per second, up to maybe 100 feet per second. So many factors play into it, it is sometimes hard to factor.

 

[45-70 nut]

I too wish there were a way to figure out MV without using a crono, as I seem to have a soft spot for shorter guns and listed MV's are usually taken from long test barrells.

 

[kdub]

18" seems to be the optimum length for .22LR barrels. After that, the longer barrels cause fricton slowing the bullet down.

For centerfire rifles, somewhere in the 32" length seems to be the maximum length before frictions sets in.

Have absolutely no idea how this works for shotguns and muzzlestuffers.

I'm going by faulty memory and what has been read in various trade publications, so hopefully, there's someone out there with actual ballistic knowledge to verify or refute these findings.