Gary,
Yes, one can open up the choke constrictions in a composite barrel. It is no different than opening up a constriction on a fluid steel barrel except that the composite barrel of iron and low carbon steel will be softer than modern fluid steels such as 4140.
One more thing, once one removes the metal forming the choke constriction, it can never be put back.
Mark
__________________
Don't hunt with a gun that will embarrass your dog!
USMC Retired
USMC Distinguished Marksman
USMC Distinguished Pistol Shot
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