My 376 is factory 20", buddy has a 19".
I had a Sako 375 that was 18" factory.
I don't think big bores nessasarily require long barrels.
Long barrels are a by-product of the semi- buckhown sight. Moving the rear sight to mid barrel shortened the sight radius dramaticly thus requiring a longer barrel to move the front and rear apart again.
The actual velocity gain/ loss from a short/ long barrel is in direct corolation to the caliber. The larger the caliber the less velocity loss per inch compared to small caliber.
In closing...scoped?...chop it.
But keep ear plugs close.
