Many use such guns and base them on the traits shared by many of the early rifle we know of. in your area a Germanic styled gun might be a better choice, many of the Virginia guns offered have English influence but I would not say it would be wrong, just that it would have some how came from another area. I think Mike Brooks had a list of the traits one should use when building an early rifle, straight wide buttplate, early style lock,minimal relief carving, .54 or larger in cal, a stepped wrist would may be a bad thing to throw in, maybe he will reference his pervious post or chime in here again, it is a "non-documentable" situation because we only have a 1761 gun and some "thought" to be from the 1755-65 era to go by but it is done quite often. I don't know about the transitional Penn/Kentucky I am not really sold on the transitional concept as described by many builders/suppliers I think it is an over simplification of gun evolution to sell guns for earlier time frames. hopefully some others with more knowledge will follow up on the early rifle concept.