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Old September 29, 2010, 05:58 PM   #3
Senior Member
Join Date: October 8, 2006
Location: Northern Michigan
Posts: 2,772
I have a Euroarms 1858 Remington New Army that was proofed in 1972; I slugged the chambers at 0.442", the lands at 0.440" and the grooves at 0.449". I would caution you to slug your gun, however, as some variations are always present.
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