I would not dare read the minds turn-of-the-century ad men wink but Miller's point re: "Bored For Nitro Powder" is well taken. Parker Lifters, 12g and esp. 10g are frequently "over-bored" by the 1890s .729" standard.

Remington's ad verbiage was more precise; this from 1895. "Guaranteed..."



H&A in 1903 "Guaranteed..."



Folson still had the "Bored for Smokeless or Black Powder" in the c. 1915 & 1916 catalogs