An intermediate cartridge. The cartridge yields increased performance in shorter barrels and effective subsonic performance for silencer use when compared to 5.56mm. .300 Casko Round is developed specifically for the NJ-206K "Ahmad" but also can still use for the NJ-102 (the gun that i used for most of my basic infantry). -STATS- Case type Rimless, bottleneck Bullet diameter 0.308 in (7.82 mm) Land diameter 0.300 in (7.62 mm) Neck diameter 0.334 in (8.5 mm) Base diameter 0.376 in (9.6 mm) Rim diameter 0.378 in (9.6 mm) Case length 1.368 in (34.7 mm) Overall length 2.26 in (57 mm) Rifling twist 1/8 inch (203 mm) Primer type Small rifle Maximum pressure (SAAMI) 55,000 Maximum pressure (CIP) 56,565 Maximum CUP 52,000 CUP Case length 1.368 in (34.7 mm) Overall length 2.26 in (57 mm) Rifling twist 1/8 inch (203 mm) Primer type Small rifle Maximum pressure (SAAMI) 55,000 Maximum pressure (CIP) 56,565 Maximum CUP 52,000 CUP
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