I think you should look at other places other than India.
Is there such a thing as a bpe rifle without pitting in the damn barrel and/or chambers? YES, Heaps, particulalry no chamber pitting - haven't seem much of that.
I wouldn't barrel ream a BP bores.
"I know of one which im certain hasnt, its an H&H and it is pricey as hell." And in 2 years time it will be even more !