I recently came into contact with a 12 bore H&H BP rifle belonging to a friend. The rifle is circa 1886. The barrels flats have London BP proofs with a a freestanding 13 (bore?). The barrels are 24&1/8 long, weigh 6 lbs 10 oz., and have .240 wall thickness at the breach end. Groove diamater is .730. Our cerrosafe cast of the chamber shows it to be 2&3/4 inch chamber. My questions are these: Is there any loading info available for this rifle? Can components be purchased? Would it be possible to load modern sabot type bullets to use in this rifle? Would it be unheard of to shooting factory 2&3/4" sabot loads in this rifle?

Thanks in advance

Nick Taxiarchis