Thanks all for comments! Yes, definitely unloaded. Checked first with the rod, which goes all the way to the touchhole, and I also have a small bore light which is visible through the hole as well. The photo is mostly just to show that region for any sign of reconversion. I don't think this is reconverted, although I will admit that my past collecting has focused on military longarms, and I find the reconversions from the military cone-in-barrel to be far easier to detect than the bolster or drum conversions.
The scrapes are from me - I do check mechanics on everything I get - for this one, the spring is a bit weak. It will strike a spark, but will not fully open the frizzen. Will get the lock off to take a peak inside in the next few days.
And I will definitely go back for a closer look at the bore - I have a borescope around here somewhere, will have to dig it out.
Regarding the stock, I wouldn't be surprised if it was refinished. The wood is a tad recessed at the buttplate. Fortunately the regions near the tang, triggerguard, and sideplate haven't been sanded into oblivion, as with some older guns I've seen.
The barrel wall thickness is what is impressing me most at first impression. Most of my smoothbore muskets have much thinner walls and the center of gravity is much further to the rear; this gun is very front heavy compared to them. It handles more like an older matchlock I have from the late 30 Years War period, when the stocks were becoming more rudimentary. The other gun I would have to compare it to is the Model 1866 2nd Allin conversion trapdoors - those had barrels lined to reduce them to .50 caliber from .58 and as a result are more front heavy than one would expect. Of course, it is much more slender and refined than those military guns.
I have to say, although admittedly a novice in the long rifle realm, for me the Lehigh rifles just appear exactly how an American long rifle should.