09/01/2026
I made my first Maynard primer tape exactly two years ago, and it’s been a steady trial and error process of improvement since then.
The breakthrough was archival research (many thanks to Paul Davies for sharing his discovery of a treasure trove of Maynard primer system correspondence from Frankford Arsenal) that revealed the glues, lacquers, and methods used to manufacture and seal the tapes.
Secretary of War Jefferson Davis was extremely enthusiastic about the Maynard primer, although Col. H. K. Craig, the Chief of Ordnance, was very hesitant. By 1859, however, even Craig conceded that the system had reached “perfection.”
Of course, the downfall of the Maynard primer was its susceptibility to moisture but probably not the way you’d think. When fresh from the Arsenal, the tapes were waterproofed so well that they could be immersed underwater for 60 minutes and still could function. Fresh, new tapes worked perfectly. The problem was with old tapes that had gone through the temperature swings of a year or more, which cracked the shellac-based lacquer and let moisture get in to the primer powder.
Having grown up playing with red roll caps for toy cap guns, the Maynard primer tape has an unusual sentimental familiarity and that may partially explain why they are just so dang fun to take to the range.