In firearms, the chamber is the portion of the barrel or firing cylinder in which the cartridge is inserted before being fired & the bullet does not have to be the same diameter
A heeled bullet is a specific design of bullet where the internal…
In firearms, the chamber is the portion of the barrel or firing cylinder in which the cartridge is inserted before being fired & the bullet does not have to be the same diameter
A heeled bullet is a specific design of bullet where the internal diameter of the barrel is often, but not always, the same diameter as the cartridge case, and the bullet has a step at the rear to allow it to fit inside the case
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Bottlenecked down to a smaller caliber
.22 / 5 mm caliber 25,500 psi Rimfire
.222 - .225* or 5.60 - 5.70 mm projectile
.226* - .2455 or 5.74 - 6.236 mm case
https://en.wikipedia.org/wiki/5_mm_caliber
22 Winchester Magnum (Rimfire) = 22 WMR, 22 Win Mag, 22 WMRF
Bullet diameter .224 in (5.7 mm)
Neck diameter .242 in (6.1 mm)
Base diameter .242 in (6.1 mm)
Rim diameter .294 in (7.5 mm)
Rim thickness .050 in (1.3 mm)
Case length 1.055 in (26.8 mm)
Overall length 1.350 in (34.3 mm)
Rifling twist 1-16"
https://en.wikipedia.org/wiki/.22_Winchester_Magnum_Rimfire
22 Long Rifle = 22 LR
Bullet diameter 0.223 in (5.7 mm) - 0.2255 in (5.73 mm)[1]
Neck diameter .226 in (5.7 mm)[1]
Base diameter .226 in (5.7 mm)[1]
Rim diameter .278 in (7.1 mm)[1]
Rim thickness .043 in (1.1 mm)[1]
Case length .613 in (15.6 mm)[1]
Overall length 1.000 in (25.4 mm)[1]
Rifling twist 1:16"[1]
https://en.wikipedia.org/wiki/.22_Long_Rifle
.22 Long = 22 L
Bullet diameter .222 in (5.6 mm)
Neck diameter .226 in (5.7 mm)
Base diameter .226 in (5.7 mm)
Rim diameter .278 in (7.1 mm)
Rim thickness .043 in (1.1 mm)
Case length .613 in (15.6 mm)
Overall length .888 in (22.6 mm)
Rifling twist 1-16"
https://en.wikipedia.org/wiki/.22_Long
22 Short = 22 S
Bullet diameter .222 in (5.6 mm)
Neck diameter .226 in (5.7 mm)
Base diameter .226 in (5.7 mm)
Rim diameter .278 in (7.1 mm)
Rim thickness .043 in (1.1 mm)
Case length .421 in (10.7 mm)
Overall length .695 in (17.7 mm)
Rifling twist 1-20" or 1-24"
https://en.wikipedia.org/wiki/.22_Short
22 Winchester Rimfire = 22 WRF
Bullet diameter .224 in (5...
