RedFeather & Everyone,
I suspect, but do NOT know, that the 1.0caliber rifle made to shoot Amun Tigers was designed to be fired from a machan (a blind in a tree) & I further suspect that it was NOT greatly different than a "wall-gun", in that it was likely fired (IF more than ONCE!) only from a rest against a driven tiger.
Inasmuch as a tiger of any size is "relatively fragile", when compared to an elephant or a Cape Buffalo, perhaps even a double percussion paradox gun would work well.
(IF I had a choice in a "certain tiger killer", I would pick a SxS percussion, a so-called "double strong", Cape-gun in perhaps .577 or .62 caliber, 1 in 48 twist, with an 8 or 10 gauge shotgun, loaded with 000 buck, on the right.- I think about 12-13 pounds & about 26 inch barrels would be about right, as I once had a 12pound, 7 ounce 9.3x74 double rifle-drilling, with a 16 gauge on the bottom, that I liked very much.)
yours, satx