I am from Indiana, have seen a lot of rifles out here over the years, and I am totally lost on how anyone would suggest this is an Indiana rifle. Burt Hamrick passed away with a collection of mid-range rifles that were not identified, and he had a passion for putting flintlocks in guns that perhaps never had one. In the activity working up to the KRA auction, his family tried to get input from his friends and other collectors on what/where/when his rifles were made. Not much time, and a lot of speculation... which is why many went so cheaply, while the few signed and positively identified guns did better.
I do not recognize the patchbox on your rifle, but the cheek and butt inlays suggest to me a possible Virginia [or today's West Virginia] rifle.
Shelby Gallien