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.22 BB Cap (Bulleted Breech Cap) also known as the 6mm Flobert, is a variety of .22 caliber rimfire ammunition. Invented by Louis-Nicolas Flobert in 1845, it was the first rimfire metallic cartridge. The .22 BB Cap and .22 CB Cap are interchangeable and are quiet.
Place of origin France
Designer Louis-Nicolas Flobert
Designed 1845
Specifications
Parent case tapered percussion cap
Bullet diameter .222 in (5.6 mm)
Neck diameter .224 in (5.7 mm)
Base diameter .224 in (5.7 mm)
Rim diameter .270 in (6.9 mm)
Rim thickness .040 in (1.0 mm)
Case length .284 in (7.2 mm)
Overall length .343 in (8.7 mm)
Primer type Rimfire
Ballistic performance
Bullet mass/type Velocity Energy
18 gr (1 g) rn 780 ft/s (240 m/s) 24 ft⋅lbf (33 J)
Highly accurate bullets with a new design: • Manufactured from precision, graphite-coated lead slug • Consistently precise bullet shape down to one hundredth of a millimetre • Precise bullet weight within a tolerance of ± 0.02 g | Superior loading: • Minimum differences in bullet speed • Exact primer dose within ± 0.002 g • Propellants within ± 0.01 g | Cartridges in this series achieve excellent accuracy due to new manufacturing technology.
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