Boing: Many shotguns will hold more shells than the migratory-bird 3-shot limit. So, llthe dowel. No law pro or con...
We've been on this same dual-purpose kick before. Late last year, as I recall...
Anyhow, a 20" barrel with the mag tube extension has the same swing and balance with the plug and three rounds as a 26" or 28" barrel without the extension. So, with screw -in chokes, why replace the 20" with the longer barrel for hunting?
The only reason for the longer barrel is for swing and balance.
John Satterwhite (see him occasionally on "American Shooter" showing shotgunning skill to drool over) told me about his personal "do everything" 870. He uses a vent rib, with a cut-out toward the rear where a dovetail slot in the barrel allows a folding rifle sight to be installed. He uses a half-size front bead. Screw in chokes. And, just behind the rear of the chokes, two rows of small holes (1/16"?) as compensator...And it's modified to shoot like a Model 12--hold the trigger and play slide trombone.
He opposes the use of pistol-grip stocks, due to the poor-control wrist-angle if you're moving in close quarters, holding the gun muzzle-up.
Have fun!
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