Quote:
Originally Posted by berettafan
Sorry frenchy but pattern at xxyds from the shooter will be wider for a given load/choke in a shorter bbl vs longer.
It doesn't start spreading till its out of the bbl. Were talking very small diff I'm sure but most def matters.
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I'm sorry to say that if you build test barrels that are identical in every respect you will definitely not be able to see the differences between a 10" , 18" or 28" barrel with modern loads. What you gain in longer flight time is less than you gain in greater pellet deformation. Simple ballistic aerodynamics.
If you inject different variables into this test, such as pellet composition, load components, choke/bore size and finish, then you will see a difference because of different variables, not because of barrel length.
This has been studied for over 100 years and is very well understood. The best grade makers were all able to guarantee a pattern size with a given load regardless of barrel length. That is why most best-grade gun-makers would also make up their own shot shells to supply with the gun.