3 ms·

yea, reads like "grains"

• kkfx 2y ago
  People do not know much about old cartridge powder measures though :D
  • antonkochubey 2y ago
    Air rifle bullets are typically specified in grains, for example
  • ndsipa_pomu 2y ago
    "Grains" are still used for measuring out powder/chemicals (also arrows). If I saw "gr", I'd interpret that as grains rather than grammes as "g" is definitely grammes, so the extra "r" must signify something.