"thirty-thirty" meaning in English

{
  "forms": [
    {
      "form": "thirty-thirties",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "thirty-thirty (plural thirty-thirties)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Firearms",
          "orig": "en:Firearms",
          "parents": [
            "Weapons",
            "Hunting",
            "Military",
            "Tools",
            "Human activity",
            "Society",
            "Technology",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1919, Hennry Herbert Knibbs, The Ridin' Kid from Powder River, page 16:",
          "text": "\"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.\"",
          "type": "quote"
        },
        {
          "ref": "1960, The Cattleman, volume 47, page 46:",
          "text": "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.",
          "type": "quote"
        },
        {
          "ref": "2014, Robert E. Howarad, The Pirate Story Megapack: 25 Classic and Modern Tales, page 2301:",
          "text": "“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!”",
          "type": "quote"
        }
      ],
      "glosses": [
        "A thirty calibre firearm designed for cartridges that originally held thirty grains of smokeless powder."
      ],
      "id": "en-thirty-thirty-en-noun-QXvnLZSc",
      "links": [
        [
          "firearm",
          "firearm"
        ],
        [
          "calibre",
          "calibre"
        ],
        [
          "cartridge",
          "cartridge"
        ]
      ],
      "raw_glosses": [
        "(firearms) A thirty calibre firearm designed for cartridges that originally held thirty grains of smokeless powder."
      ],
      "topics": [
        "engineering",
        "firearms",
        "government",
        "military",
        "natural-sciences",
        "physical-sciences",
        "politics",
        "tools",
        "war",
        "weaponry"
      ],
      "wikipedia": [
        ".30-30 Winchester"
      ]
    }
  ],
  "word": "thirty-thirty"
}

{
  "forms": [
    {
      "form": "thirty-thirties",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "thirty-thirty (plural thirty-thirties)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Firearms"
      ],
      "examples": [
        {
          "ref": "1919, Hennry Herbert Knibbs, The Ridin' Kid from Powder River, page 16:",
          "text": "\"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.\"",
          "type": "quote"
        },
        {
          "ref": "1960, The Cattleman, volume 47, page 46:",
          "text": "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.",
          "type": "quote"
        },
        {
          "ref": "2014, Robert E. Howarad, The Pirate Story Megapack: 25 Classic and Modern Tales, page 2301:",
          "text": "“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!”",
          "type": "quote"
        }
      ],
      "glosses": [
        "A thirty calibre firearm designed for cartridges that originally held thirty grains of smokeless powder."
      ],
      "links": [
        [
          "firearm",
          "firearm"
        ],
        [
          "calibre",
          "calibre"
        ],
        [
          "cartridge",
          "cartridge"
        ]
      ],
      "raw_glosses": [
        "(firearms) A thirty calibre firearm designed for cartridges that originally held thirty grains of smokeless powder."
      ],
      "topics": [
        "engineering",
        "firearms",
        "government",
        "military",
        "natural-sciences",
        "physical-sciences",
        "politics",
        "tools",
        "war",
        "weaponry"
      ],
      "wikipedia": [
        ".30-30 Winchester"
      ]
    }
  ],
  "word": "thirty-thirty"
}