You may be correct as far as cutting below the neck. I'll have to wait until I get in the lathe. Right now, the monoblock (4140) is drilled to 5/8", so I have ample meat. If I have too small a chamber area.......well, buy a couple of blanks. It would have nice to use a 30-06 but Ellis doesn't recommend. I'm using an AyA 12ga.
Besides, good discussion going on. I personally am enamored with the lore of the double. I love the fun of building guns. I love pouring over pics of the H&H's and would love to own a classic '50's Rolls.
Besides, at 50 yds., how close do the bullets have to be to bring down a Buff? With the best regulated gun, what's the best group you Vets can shoot off-hand in quick succession?
Hell, let's keep the 'discussion' going!