what about a 6 foot barrel?
- Thread starter KSB209
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elkaholic
Well-Known Member
Good read!
Bear in mind that a 308 is not at all overbore capacity and uses faster burn rate powders.
Something like a 264 WM would obviously be able to use more barrel length before it reached diminishing returns and an inch of barrel loss would lose a lot more than 15".
Good info though
Much quieter for the shooter? I know a 60" barrel on a 12 gauge has much less report than a typical 26-28".
Mikecr
Well-Known Member
There was never a reason to think that bullets would actually slow or stop with increasing barrel length.
Yes the increases can get so small as to be lost in a chronograph resolution, but they're still increases.
He could have gone to a 500" barrel, and MV would not drop lower.
As long as there is enough pressure to overcome bore friction and air drag the bullet will keep on going, and these are very tiny resistive terms. The engraved bullet is also seeing less & less friction/drag as it travels down the bore & with pressures dropping.
There is also no reason to think a bullet would become less stabilized, as twist rate holds -regardless of velocity.
Yes the increases can get so small as to be lost in a chronograph resolution, but they're still increases.
He could have gone to a 500" barrel, and MV would not drop lower.
As long as there is enough pressure to overcome bore friction and air drag the bullet will keep on going, and these are very tiny resistive terms. The engraved bullet is also seeing less & less friction/drag as it travels down the bore & with pressures dropping.
There is also no reason to think a bullet would become less stabilized, as twist rate holds -regardless of velocity.
88" is more like 7' 4"
Imagine carrying that thing on a hunt. Might as well fly a flag from it when slung on your back. 
Here's a link to an article I read a few years ago about barrel length & diminishing returns or something to that effect.
riflebarrels.com
Barrel Lengths in the 338/378 Weatherby Magnum - Lilja
A few years ago we made some additions to our barrel making machinery that allowed us to make barrels in some calibers and twists with finish lengths of up to 46 inches. One of the first calibers we added in these extra-long barrels was the .338 and in a 10″ twist rate. During the initial...
BillLarson
Well-Known Member
I got a 375 cal. 36" long xcaliber
it will get you half the way there...
