回覆 7# chenjyhming
.22 cal 大約等於 5.7 mm
一般BB彈 6mm
中華民國法規 20焦耳以上就不是玩具...就有殺傷力
下面是 18x J
Specifications
Case type Rimmed, Straight
Bullet diameter .223 in (5.7 mm)
Neck diameter .225 in (5.7 mm)
Base diameter .225 in (5.7 mm)
Rim diameter .275 in (7.0 mm)
Rim thickness .040 in (1.0 mm)
Case length .590 in (15.0 mm)
Overall length .985 in (25.0 mm)
Rifling twist 1-16
Primer type Rimfire
Ballistic performance
Bullet weight/type Velocity Energy
40 gr (2.6 g) Solid[1] 1,080 ft/s (330 m/s) 104 ft·lbf (141 J)
38 gr (2.5 g) Copper-plated HP[1] 1,260 ft/s (380 m/s) 134 ft·lbf (182 J)
31 gr (2.0 g) Copper-plated HP[1] 1,430 ft/s (440 m/s) 141 ft·lbf (191 J)
30 gr (1.9 g) Copper-Plated RN[2] 1,750 ft/s (530 m/s) 204 ft·lbf (277 J)
32 gr (2.1 g) Copper-Plated HP[2] 1,640 ft/s (500 m/s) 191 ft·lbf (259 J) |
