Barrel length

[Levi Garrett]

I tested .308 match rounds , handloads , from 26 and 22 inch barrels, 120 fps differance at the muzzle 2 differant guns but what the hay eh!
Frank

 

[boonerbuck]

At some point barrel length will reduce velocity with any given calibre. As powder is reduced, the nearer to the chamber the peak will be. That's why the link I provided shows the 204 Ruger being optimum at 23" with the bullets they tested.

 

[John Y Cannuck]

I tested .308 match rounds , handloads , from 26 and 22 inch barrels, 120 fps differance at the muzzle 2 differant guns but what the hay eh!
Frank

Two different guns = 2 different chambers, 2 different throats, two different a hell of a lot of stuff. It would be hard to come up with a fair test without taking a full length barrel and cutting it off and re-testing.
Seems to me there was an article with just such a test in I think Rifle magazine a while back.

 

[Levi Garrett]

Two different guns = 2 different chambers, 2 different throats, two different a hell of a lot of stuff. It would be hard to come up with a fair test without taking a full length barrel and cutting it off and re-testing.
Seems to me there was an article with just such a test in I think Rifle magazine a while back.

I know , was gonna cut it, but forgot the saw
Frank

 

[PeterPan]

Shorter and thicker bbl means less vibration which gives better accuracy.
If we can sacrifice some velocity and find powder which will burn near 100% at the length of our shorter bbl we may have a winner.