Craig, I would tend to think DD barrels might be more abundant (in stock) due to the fact that Parker only used them on guns of grades 5 and above, though we know of a couple of grade 4’s with them.
Just my take on the DD’s, though granted, sourcing composite barrels from Europe at that time had just about ended.
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"I'm a Setter man.
Not because I think they're better than the other breeds,
but because I'm a romantic - stuck on tradition - and to me, a Setter just "belongs" in the grouse picture."
George King, "That's Ruff", 2010 - a timeless classic.
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