Well, I'm pretty thrilled with it so far. Lock seems a little on the weak side and sometimes has to be cocked and fired a few times before getting me a good spark, but some may be user error in getting the flint in place right. I fired off about 11 shots today as I worked up a load that shot to about 30 yards where I aimed with my bayonet lug as an improvised front sight. I'll try to get a picture tomorrow of the thing, but that puts a LARGE hole in what it hits.
I worked up from 60 gr. starting to 90 gr. and 90 was the best for accuracy at 30 yards for me. If I can get the lock being a bit more consistent I'll be pretty happy. I haven't played with shot too much yet, but hope to this next week.