Jim,
Actually, from what I understand that actually depends on the vintage of the gun.
Apparently later American Damascus barrels used all steel, just varying grades, which were then treated with acid baths and staining solutions to really enhance the differences.
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"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.
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