Wow, this is a really excellent and difficult question. Sorry for the long reply.
I am not a collector--never owned a Kentucky rifle and likely never will. But I do research and publish on gunsmiths and, more generally, the gun trade in the eighteenth century, and I have learned a lot from the research that folks on ALR Forum (and elsewhere) have done.
That said, much if not most of that research is inaccessible to most people. You cannot find KRA publications in many libraries and they are almost never in large university research libraries where they would be available to non-collector researchers. Take the excellent Moravian Gun Makers of the American Revolution. WorldCat, the catalog that is a good guide to holdings in libraries around the world, indicate it is only in 5 libraries, none of these circulating/research libraries. The recent Lancaster Long Rifle book is only in 8 libraries and the earlier Berks County Longrifles only in 6: in the two last instances, only one of these institutions, Princeton, is a library that could loan this book to university-based researchers (historians, art historians, etc.) around the country.
I should add that academic researchers cannot afford to buy as individuals the many, many, many books they use in their researches. They rely on borrowing from libraries. So they will not buy the high-quality longrifle books that typically retail for $75 or $100. The only way to encourage non-collector researchers to use these books is to make them available in libraries that will lend them through interlibrary loan.
Similarly, the magazines/journals where gun or rifle research appears--KRA Bulletin, Muzzle Blasts, etc.--are also not available in research libraries. So it is next to impossible to obtain a copy of an old article even if one knows it exists.
A small piece of a larger solution about how to take gun-collectors' research outside the gun-collecting community might be to donate copies of all KRA publications to research libraries across the county: UCLA, U Chicago, U Texas at Austin, U Penn, Michigan, Harvard, wherever. This doesn't mean that individuals would have to use these books at these places, but it would ensure that these books would come up when other researchers do searches on these topics and so they would be known (and eventually used).
Another possibility would be to make back issues of KRA Bulletin or Muzzle Blasts, etc., available for free online. I know this won't seem like a good business decision to the folks who run these publications. But it may be a good idea for the long run. If these back issues are available online, in searchable form, they will turn up when people do online searches and the research will be far more well known. It is the only way to make this research available to the general public and build a new generation of interested researchers.
If all this remains unavailable, as at present, the situation will remain the same: gun collectors' research will reach only other gun collectors. That isn't healthy for the research itself (which always benefits from different perspectives) and deprives historians, art historians, etc. of all of this rich knowledge.