Well...... Now I have to go shoot some photos of this VERY topic... I ended up buying a pile of TC Hawken stocks, all factory seconds, about three years ago. I finally got around to messing with them. Most are between 70-90% finished but many have minor cracks, splits, or deformations of some kind. I picked out the nicest six and took to working on them as they were the most complete and least damaged. Of the two I started with, both had serious dents that after a lot of steam time, still refused to fully return to normal-ish.
I have finished up two, still needing some parts for one of them. The first I had a lot fixing to do as it had quite a few chucks of wood missing but the overall length was fine so I finished it off just like a standard Hawken. I over-paid for most parts on ebay but it was a winter project and I had to have the parts. The second stock I worked on showed a few issues as well and I decided to turn it into a carbine length and find a White Mountain or PA Hunter carbine barrel for it. I did not want to cut off the under rib, so shortening the stock was the only choice.
I thought about shaping the fore end/nose cap back the nearly 1-inch necessary to accommodate the carbine barrel/rib but ended up doing the easy thing, which was to just cut the stock short. This also fixed a missing chip of wood on the left side of the barrel channel, right at the top and end, 3/4 of an inch worth. I was able to cut and sand away to form a nicer look. The next issue was how to deal with the ram rod entry hole. I contemplated a few options and decided to use the router to finish it like the Renegade/Pa Hunter models. Well, even doing a pass at less than 1/8 inch created two new missing chunks of wood... so, I slowly continued and ended up with a fairly decent slot.
I am waiting on new 'old' version wedge plates since I prefer the inset look instead of the bulky 'over the hole' look. I'll swap out the current 'new' version in a few days. I was lucky to snag a White Mountain flint lock barrel, again from ebay and will likely pick up a cap barrel as well since I have both extra locks for either. Everything fits nice and snug but not too snug.
As for the wood finish on both stocks, I did not do a wet-sand fill process as I wanted to see how well it would turn out without. The standard stock is finished in only True Oil. I did not overly reduce the wood on either, although the carbine is a bit more thinned. The length of pull on the standard stock is perfect for me. I'm 6'2 with long arms and that thing has a great fit. I have a .50 cap barrel which is like-new for that one. The carbine stock is finished with Birchwood's Dark Walnut stain, full strength and wool rubbed back to a lighter finish... I wish it were darker. For the brass, I polished up some really aged parts to allow them to either age all over again OR possibly black them, which I'm leaning toward doing but I'll live with it in the natural state for awhile.
I need to go over the stocks with the stock sheen/conditioner and knock that glare off a bit as well and then I'll remount the furniture and see how they look.
I absolutely DO NOT need these two stocks/barrels but they were good projects the last several months. I've still got a pile of decent, partly carved stocks if anyone is interested.
TLDR: Yep, possible and can be done easily if you want to do so. Odds are you will do a much better job than I did as my skills are mediocre but hopefully improving over time.