I just tried poking a 1/16" bit in the hole, no go. Bare primer? I guess so? I converted to the 209 primer breech plug from the original cap plug years ago. No disk, so I guess it's bare primer.

Faith and love of others knows no mileage nor bounds. That's simply the way it is.
dogzapper

After the game is over, the king and the pawn go into the same box.
Italian Proverb