Originally Posted by RJay
It could also be one of those peacetime items that didn't carry over.
Makes sense. But 1863 Springfields were all made during the civil war, right?
I have a copy of The Rifled Musket
, by Claud E. Fuller. It sheds no additional light on the tompion. There are many wartime letters back and forth among the Springfield Armory, various ordinance officers, and the chief of ordinance, agonizing over the smallest details of the Springfield musket design and proposed design changes. I haven't seen any correspondence regarding tompions. But, I'm thinking that buried in the archives might be a proposal and discussion of eliminating tompions from new muskets, and perhaps not ordering any more replacements.
The "manual of arms" for firing the Springfield doesn't list removing the tompion before loading and firing.
The procedure for "dismounting" (i.e., disassembly) has: Step 1st. Unfix the bayonet; Step 2d. Put the tompion in the muzzle of the barrel; etc.
I wonder if perhaps some friend or relative of a powerful politician might have been in the tompion business? Did the CSA issue tompions?