I really don't know why this subject is even here, on the forum? None of these come in "Rifled" as all of them are Smoothbores.
I have a few of them, Indian made guns, and a lot of other really expensive custom Flintlocks, some as high as $4000-5000, the Indian made guns are shootable, safe for what I use them for, and only a filler for guns not available in the open market.
I drill my own touch holes and proof them in the Desert tied down to a tire. I get behind a solid object and test each one. I've never had a problem.
Overall, being a Firearms Dealer since 1984, I would always buy a used custom gun, before I would chose one of the Import guns. I've bought a wonderfully well-made Jaeger, in .62 cal., and many others second hand for $500-900, and the guns are just better made for fit and finish, without a doubt. OTOH, I do own an Indian made, Scottish pistol, Murdoch style, a Matchlock .75 cal., a Fish Tail Flintlock., .75 cal and a Brass barrel Blunderbuss. All have been satisfactory "Shooters" and decorators. I don't overload them.
I prefer a Brooks made Fowler, my Jim Gefroh, Big Bore Jaeger in .58, and my Steve Zihn, .62 and .50 cal Rifles.
Given $600-800 cash in hand, I'd be looking for a nice used Flintlock, on the sales boards or GB and take that, over any Indian Made import.
If my absolute budget was $300-400, I would have not much of a choice, in buying an Indian Made flintlock. Just plan on sending it to a good BP smit, to work over the parts, such as the lock.
JMHO...
And my deepest respects to all of the American BP makers, such as Brooks, Zihn, Day, Gefroh, and all the others, that are the finest Craftsman.
Their skills will keep this sport alive.