Jack has some great advice on cleaning these old girls up. I had not thought of Gunk.
The gauge could very well be 10. My 1881 12 gauge has .752 bores with about .013 constriction in each barrel. That means that if I were to mic the muzzel it woud tead about .739. My 1881 10 gauge on the other hand has .802 bores with about .030 constriction in each barrel. At first I thought the gun had wide open chokes because I measured them as you have your Parker. A standard 10 gauge has .775 bores and my muzzel measurement was .772! While at the Souther Side by Side Championship several years ago Jent Mitchel measured my bores and revealed the truth. The 10 was a popular gauge back then and they are great fun to shoot. Please keep us up to date as your project continues.
Kindest, Harry
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