The Max. load markings were used 1897-1903; 36 grams or slightly > 1 1/4 oz. lead and 36 grains of Smokeless Powder.
Please ask your friend if the Smokeless Proof stylized lion is over P.V., E.C., SCH or possibly E.C. No. 3
The original Schultze & E.C. No. 1 Bulk Smokeless were 14 grains/drachm.
New Schultze, New E.C.(Improved) No. 2 Bulk Smokeless were 12 grains/dram, or 36 grains = 3 Dr.Eq.
Walsrode Gray, "E.C." No. 3 & Mullerite No. 2 were 11 grains/dram or 33 grains = 3 Dr. Eq.
SO if proved for "E.C." No. 2 the max. load would be 1 1/4 oz. with 3 Dr.Eq.
If proved for "E.C. No. 3" the max. load would be 3 1/4 Dr.Eq.
It has 2 1/2" chambers.
The bore is 18.3 = a tight .720". The L barrel muzzle constriction is 17.4 = .685" = .035" choke.
I can't read the R mark in mm.
The P1KG3... is the barrel weight at the time of proof. If > 3% less now it is considered out of proof.
The action flats might have a maker's mark.
