Quote:
It seems they are intending to include everything but centerfire breech loading guns.

Note that Rimfire breech loading guns are in the same category as Centerfires as long as ammunition is readily available.
Where the problem arose was when they allowed reproductions to fall in the same category as antiques & not require a license. You cannot reproduce for instance reproduce an 1873 Winchester & chambered in .44-40 & sell it without due process. You can however sell any original 1873 in .44-40 (or other calibers) as long as it was made prior to 1899 without paperwork.
Where many get confused is they are reading the part which applies to repo's & applying it to antiques.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra