20"vs24" Slug velocity's?

[canadaman30]

Is there much f/p/s difference with slugs from a 20" compared to a 24" rifled barrel?

 

[Mike Webb]

Don't know about slug velocities but birdshot reaches maximum velocity in around 18 inches of barrel. I don't think rifle rules apply to shotguns so much.

 

[saskcop]

There is so little powder that it is burned in relatively short barrel lengths. It is also a very fast burning powder. I think that 20" is all you need (max) for slugs. I have chronied slugs out of 18.5" barrels and just about gotten the published velocities.

 

[Boomer]

When you think about barrel length vs powder consumption, the diameter of the barrel is an important consideration. Barrel volume is the key, rather than barrel length. Thus medium and large bores consume an equal amount of powder in a shorter barrel length than do small bores. At .73 caliber, a 12 gauge is decidedly a large bore, and the powder is consumed in a relatively short distance from the chamber. Having said that, I chronograhed a number of brands of 12 ga slugs from my 20" 590, and few lived up to their advertised velocity. Pick the brand of slug that you prefer, sight in your gun accordingly, and go hunting.