Thanks for that SSShooter... never thought of using double wads like that.    

Can always use learn another solution for wiping too.      

Do you finger seat or use seat with neck tension?

Nobody is taking me up on that question.   Still wondering if a chamber .001 over OD of case neck diameter (with a seated bullet) is about right for that or maybe with spring back from the case .002 over would be better.

Match rifle is finger seating only for me - eliminates another variable.  And .001 over brass diameter (which one?  sized?  unsized?) would be pretty hard.
Suggest you approach it the other way.  Section a case from the lot you'r going to use and measure wall thickness at the mouth, measure your bullet dia., if you want to seat the bullet, you'll need at least .001 difference between case ID and bullet dia. Also add something for brass springback - at least .002.  otherwise you might end up with neckturning every case, which is pretty labour-intensive...

No reason to go bigger than groove dia. with the bullet - it just gets swaged back down.  If your barrel is groove .408, then a .408 bullet is more than good enough.  At least, that's what I do in my no.2 Musket.  .458 bullet, same as groove - but I found out the hard way that .001 clearance isn't enough - neck turning time...

SgtDog0311 wrote on Nov 19^th, 2015 at 9:13pm:

My chicken/200yd load with the 400gr BACo Money bullet & 58gr of 2F Swiss has 3x0.060" wads and I've shot several 100/7X with it (and would be very happy to get 7 chickens ).
Am using Trimsol cutting oil and it is great. Quite a number of us use it as one of our fellow shooters bought a 5gal pail and sells it in pints for $5. Use about 1-2 per season. I run very wet patches.
I do not work my brass after fire-formed to my chamber. I anneal the neck ~every 10 firings, which works out to about twice a year for me. I thumb seat the bullet and then use a CH4D bushing neck sizing die to put 0.001-2" tension on the bullet. With only about 0.250-0.325" of the bullet in the case, I don't need to neck size very far down. Just enough to put some consistent tension and square up the case neck/bullet to the axis of the bore. Between that and pushing the bullet into the lands as much as I can with my thumb I believe that I'm getting everything settled about as well as I can without actually breech-seating. I can turn the bullets in the case and pull them out with a determined effort without tools after putting in the tension.
I'm not sure what you are asking about the chamber. I bought a DanT (may he RIP) designed reamer and had my rifle chambered using it and simply go with fire-formed brass and the bushing neck-sizing die mentioned above to add a bit of tension and am very happy. John Taylor, a well known/regarded gunsmith who posts on this board now has the reamer. 
My barrel is a GM and it shoots great. is a nominal 0.400"x0.408" and all my BACo bullets drop at 0.4095", +/- 0.0005". I pan lube and do not size the bullets. They are very round (especially when they leave the barrel ).