Mark: Nice gun. I believe your gun is a Quality 2, mine is a Quality 3, very minor differences. Anyhow, thanks for the info on the bore dia. I am thinking .790 may be the original dia. in that guns of this era were made for brass shells and the internal dia was larger to accommodate the larger wads required for the thin brass shells. Parkers of this era had bores in the .790 to .800 range. Any input from other owners of Syracuse Elsies??