I'm not 100% sure where the breakdown on full or half stock is, especially when your talking historical accuracy (full stock being wood all the way to the muzzle). My observation when looking around at shoots with the re-enactment group I'm with is your later period (post 1800) rifles incorporated the 1/2 stock. You see them in the Hawkin and Great Plains style rifles. Your earlier frontier period (pre-1800) rifles had the full stocks. You see them a lot in the Kentuky and Tennessee style rifles.

I'll post this inthe re-enactment forum I'm in. There is a few history nuts in that group and I should get a thorough response as to the "what is what".