Big D, My Browning Citori Trapgun has 67702+ counted rounds through it.
41244 through the top barrel and 26458 through the bottom. No signs of errosion.
The plastic and carbon that collects in the ports probably acts as a protection?
And the gun has not had one mechanical failure I might add.
A modern day "Old Reliable"?
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"Double guns are a sport and a pastime built into a beautiful package to which I attach myself when entering the great theater of autumn, those days now grow more precious because we are given so few".. Robin Lacy