.22 BB

Infobox Firearm Cartridge
name= .22 BB


caption= A .22 CB cap, .22 CB short, and .22 Long Rifle; the BB cap is the same length as the CB cap, but uses a round ball
origin= USA
type= target
service=
used_by=
wars=
designer= Flobert
design_date= 1845
manufacturer=
production_date=
number=
variants=
is_SI_specs=
parent=tapered percussion cap
case type=rimfire, straight
bullet=.222
neck=.224
shoulder=
base=.224
rim_dia=.270
rim_thick=.040
case_length=.284
length=.343
rifling=
primer=
is_SI_ballistics=
bw1=20
btype1=rn
vel1=780
en1=26
bw2=18
btype2=rn
vel2=780
en2=24
bw3=16
btype3=rn
vel3=750
en3=20
bw4=
btype4=
vel4=
en4=
bw5=
btype5=
vel5=
en5=
test_barrel_length=
balsrc= Cartridges of the World ["Cartridges of the World 11th Edition", Book by Frank C. Barnes, Edited by Stan Skinner, Gun Digest Books, 2006, ISBN 0-89689-297-2 pp. 490, 492]

.22 BB Cap (Bulleted Breech Cap) is a variety of .22 caliber rimfire ammunition .22 BB cap and .22 CB refer to cartridges that are low velocity and project reduced noise. These rimfires closely resemble a .22 caliber air rifle in power and are often used for indoor shooting and close range pest control. Developed for indoor shooting galleries with special "gallery guns", the .22 BB Cap was the first rimfire cartridge, dating back to 1845. It has no separate propellant charge, relying on the impulse created by the primer alone to fire a round lead ball. This results in a low muzzle velocity of around 700 ft/s (210 m/s) or less. More common is the .22 CB ammunition, which fires a slightly heavier conical bullet and is available in a variety of cartridge lengths.

pecifications

*Length:
**Case: 0.284 in (7.2 mm)
**Overall: .343 in (8.7 mm)
*Bullet weight: 18 gr (1.17 g)

ee also

*.22 CB
*.22 Short
*.22 Long
*.22 Long Rifle
*.22 Magnum

References