Dr. Boone,
Thanks for your tacit support. This whole thread has now come full circle. If the 'nesting' question has been answered, then the only possible question left, is to what purpose would such a load be used?
The original question posed to the forum, afterall, was phrased as "Why would one want to do this?" "Why not (?)
"
If it's to satisfy a curiosity or to only put little holes in sheets of paper, then there's little more to be discovered. By-and-large though, most anyone who uses or has to use 'buckshot' is NUG (normally, usually, generally) going to hunt with it and hence my question.
And yes, adding buckshot to a .600 RB would be strictly optional on the users part. Not an unheard of type of load, especially amongst the military who used it to good effect, but again, strictly optional.
So: 1.) Why would one (you, in response) want to do it? And, in the alternative
2.) Why (would you, in response) not (do it) ?
I'll restate: If the buckshot must be perfectly nested, then I'd use such a load on geese, but I'd deem the size of the buckshot, in that load, as too small for hunting deer, with a 20 ga. BP muzzleloader.