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  2. Military 12-gauge cartridges - Wikipedia

    en.wikipedia.org/wiki/Military_12-gauge_cartridges

    While shotguns had been used in earlier conflicts, the trench warfare of World War I demonstrated a need for standardized weapons and ammunition. [2] Initial issue with each shotgun was one hundred commercial-production paper-cased shotgun shells containing nine 00 buckshot pellets 0.33 inches (8.4 mm) in diameter.

  3. List of the United States Army munitions by supply catalog ...

    en.wikipedia.org/wiki/List_of_the_United_States...

    T3AUD = 240 Shells, Shotgun, 12 Gauge, No.8 Chilled Shot, Paper Cased, in 10-shell cartons. 12 cartons per M10 metal ammo can (120 shells). 2 × M10 ammo cans per M12 wooden crate. T3AWD = 360 Shells, Shotgun, 12 Gauge, No. 4 Chilled Shot, in 10-shell cartons, 12 cartons per M10 metal ammo can (120 shells). 3 × M10 ammo cans per M15 wooden crate.

  4. List of military headstamps - Wikipedia

    en.wikipedia.org/wiki/List_of_military_headstamps

    Early ammunition had a 4-digit year with the first 2 digits (thousands and hundreds) at 9 o'clock and the second 2 digits (tens and ones) at 3 o'clock. Ammunition with an E at the 12 o'clock position (which stands for Ersättning , or "Substitute") have a bimetallic cartridge-case (brass-clad steel) due to wartime economy measures during World ...

  5. List of primary education systems by country - Wikipedia

    en.wikipedia.org/wiki/List_of_primary_education...

    Subjects usually taken up include Communication Arts in Mother Tongue (until Grade 3), English (some private schools break this down into Language and Reading) and Filipino, Mathematics, Science, Social Studies (taught in Mother Tongue from Grade 1-Grade 3, Filipino in Grades 4-6), Music, Art, Physical Education and Health (collectively known ...

  6. Educational stage - Wikipedia

    en.wikipedia.org/wiki/Educational_stage

    Grade or Year 3 8–9 Grade or Year 4 9–10 Grade or Year 5 10–11 Grade or Year 6 11–12 Grade or Year 7 12–13 Grade or Year 8 13–14 Grade or Year 1 14–15 Secondary – High school: Grade or Year 2 15–16 Grade or Year 3 16–17 Grade or Year 4 17–18

  7. Gauge (firearms) - Wikipedia

    en.wikipedia.org/wiki/Gauge_(firearms)

    The move to steel shot reduced the use of 16 and 20 gauges for waterfowl hunting, and the shorter, 2 + 34-inch (70 mm), 12-gauge shells as well. However, the 3 + 1 ⁄ 2-inch (89 mm) 12-gauge shell, with its higher SAAMI pressure rating of 14,000 psi (97 MPa) compared to standard 2 + 34-inch (70 mm) and 3-inch (76 mm) 12-gauge shells ...

  8. K–12 education in the United States - Wikipedia

    en.wikipedia.org/wiki/K–12_education_in_the...

    High school (occasionally senior high school) includes grades 9 through 12. Students in these grades are commonly referred to as freshmen (grade 9), sophomores (grade 10), juniors (grade 11), and seniors (grade 12). At the high school level, students generally take a broad variety of classes without specializing in any particular subject.

  9. List of semi-automatic shotguns - Wikipedia

    en.wikipedia.org/wiki/List_of_semi-automatic...

    Year AAI CAWS: AAI Corporation: 12 gauge, 12 Gauge Special SA FA SG Detachable box magazine United States: 1980s Akdal MKA 1919: Akdal Arms (Ucyildiz Arms A.Ş.) 12 gauge: SA SG Detachable box magazine Turkey: 2006 AK12 Tactical 12/76 [1] [2] Sino Defense Manufactung 12 gauge: SA SG Detachable box magazine China: Armscor Model 30: Armscor: 12 ...