shrink fitting does not "choke" a gun barrel.....

[3n00n]

It might 'feel' like a choke and hold enoughlead to 'create' constriction, but would be a less reliablechoke asfollowing pellets 'swipe' leadacross the abrasive surface.

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Whatfield of expertisedo you support in this dicussion?

I've been a mechanic, tool room machinist, field engineer specializing in 1st order work, and have been tinkering with bbguns for a few decades. The course load I studied was engineering with emphasis in structural design, including metallurgy for mechanical as well as structural applications.