thirty-thirty

plural thirty-thirties

1. engineeringA thirty calibre firearm designed for cartridges that originally held thirty grains of smokeless powder.

   “I'll get one of those thirty-thirties out of the rack and slip her into the boat . Maybe we won't use it, and maybe we will . We might meet that Pirate Shark, you know!”

   2014, Robert E. Howarad, The Pirate Story Megapack: 25 Classic and Modern Tales, page 2301

   2 more examples

   "What do you know about thirty-thirties?" "Huh, I know lots. My other pop was tellin' me you could git a man with a thirty a whole heap farther than you could with any ole forty-four or them guns. I shot heaps of rabbits with his."

   1919, Hennry Herbert Knibbs, The Ridin' Kid from Powder River, page 16

   Now that the season has arrived in many parts of the country for the nimrods to load their trusty Thirty-Thirties and go forth in quest of the elusive deer, it seems an appropriate time to say a word about the skilleting of venison — which can be a pretty tough and dry proposition if not properly handled.

   1960, The Cattleman, volume 47, page 46