Great shot, Mike!  That looks like a rifle anyone would be proud to have and shoot.    I know getting that one picture up was a hard job, but how about a full length shot to show the stock as well? I'm sure I'll short out my keyboard drooling, but it would be worth it.   
Ken, as we discussed in a previous phone conversation, I am less interested in the CC-DSTs than their widespaced schuetzen type brethren, but it would be worth my while to put one set on an original tang (since minimal alteration is required) and have them laying around should the need arise.  Is Steve planning on making the hammers with flies and the long tailed sears as well?  What I would REALLY like to see at this point is a set of set triggers that I could fit to my Frankenstein Brown Ballard action.  Then I would build the Ballard bench .22 to end all!  8)  And just so this message still fits the thread title, either of those projects would be sufficiently accurate to beat my dearest friends.   
Regards,
The Green Frog

MP,
  Without shooting your gun personally, I would take a guess that you are getting a fouling ring just in front of the chamber. Most seem to think they can shoot all day with smokeless and never have to worry. But shooting plain base cast bullets the lube will start combining with the powder fouling from the first shot, and depending on your gun, lube, & powder can mean you might have to clean your gun after every group/score. I know guys who will even in the middle of a score/group will clean their gun out if they feel there shots are opening up.

  You don't mention what powder you're using, but the ball powders seems to build up faster than the stick type.

  Also not sure why you're shooting that many foulers. Even out of a clean cold barrel I've never seen the need for more than two, and most of my guns will start shooting after one.

  Fill me in on some of the details and maybe some of us can give you some hints to try.

PETE

MP,
  I guess if that rifle takes 4 or 5 shots to settle down you don't want to argue with it. I know shooting BP that some rifles are very finicky about how they want to be wiped out and I try and accommodate them.

  Looks like you've got the bases covered then. If the Schoyen bullet is the most accurate bullet in that other rifle I'd look into getting one of the custom makers to make a copy. That buddy of yours must be a special friend to loan you a mould. It's something I rarely do. To easy to get them screwed up. I also don't like ot borrow moulds for the same reason.

  As for shooting that Neidner rifle...... Why not!? I sure would. Of course I wouldn't with jacketed bullets, but with plain base cast bullets I don't see any harm. There are many recorded cases of over a 100,000 rounds put thru those old rifles with no loss of accuracy.

PETE