The shot would be spinning as it exited the barrel and the result pattern would be extremely spread at a very short range. In other words, rifled barrels are useless for shot. An added cylinder choke wouldn't affect accuracy of the slug most likely but as stated above it wouldn't help with the shot problem.
Since I'm having some trouble getting my new turkey barrel, I've been thinking. Does anyone know if you can have a rifled slug barrel threaded for a choke? Would the rifling effect the pattern. How would it effect the accuracy of a slug?
Any thoughts?
Are you sure the shot would actually be spinning? I have been told more than once that you can shoot shot through a rifled barrel with the only concern being lead build up in the lands and grooves of the rifling. This has always made sense to me because an actual bullet or sabot fits very tight to the rifling which in turn causes the projectile to spin...with shot not having that pressure (A loose fit) up against the rifling it's hard to believe it would spin coming out of the barrel. Now I'm curious about this and it makes me want to get out my rifled deer gun (shotgun) and do a little pattern testing.
UPDATE: I just checked my 20ga. rifled barrel with a choke gauge and it is Improved (wide open) which probably wouldn't give you the pattern density or range that you would want for turkey hunting. I'm going to assume that most rifled shotgun barrels are going to be this wide open on their choking (if there is even such a thing as a choke/choking on a rifled shotgun barrel).
It makes perfect sense to me. I think you should have one made and test if with a full report here. You are truely a forward thinker on the project. It may even tighten up the pattern as they rifling induces spin on each of the projectile in the patter as individuals making them fly true, similar to rifled barrel of a muzzle loader shooting a patched round ball. It only amazes me no one has already thought of it.
Let us know how it works out.
The forward velocity is going to compact the shot in the wad's shotcup to basically a solid mass. Almost all rifled barrel are slightly undersized in order to grip sabot slugs (which are what they are meant for) in order to impart spin to them. This means the rifling will impart spin to the shot mass and wad in the same matter. Centrifugal force when the mass exits the barrel will cause a rapid dispersion of the shot resulting in a large donut shaped pattern.
This can be use in reverse however, Hasting makes their Wadloack barrel which has straight rifling. This creates an absolute zero spin exit from the muzzle. The result is a much denser and even pattern. I use a straight rifled Hastings barrel on my 1100 and it tightens up the pattern by at least one choke, makes IM shoot like extra full.
Hasting makes their Wadloack barrel which has straight rifling. This creates an absolute zero spin exit from the muzzle. The result is a much denser and even pattern. I use a straight rifled Hastings barrel on my 1100 and it tightens up the pattern by at least one choke, makes IM shoot like extra full.
I don't think the shot would be spinning, and if it was, it wouldn't matter. Further, the rifling wouldn't "lead up," it would "plastic up" from the wad.