In terms of power, or diameter? A .22 has a bullet diameter of .223 inches, the same as the .223 Remington and 5.56 military cartridge. The .222 Remington actually has a bullet diameter of .224 inches.
a .22 caliber
A rifle that shoots a .22 caliber bullet.
value of a model 49 ithaca 22 caliber rifle
A JC Higgins .22 caliber rifle, model 103.229 is about 55 years old as of 2014.
1968. They also made a .22 rifle that used a special caseless .22 cartridge.
A 22 caliber rifle is a firearm and a BB gun is an air gun (Not a firearm) Now if you are asking about a .22 caliber air gun then the difference is in the size of the projectile. A BB is a hard round .175 caliber ball. The .22 caliber is a larger size pellet.
Model indicates a particular design by a particular maker. In the case of the Marlin/Glenfield Model 25 rifle, it is a bolt action rifle in caliber .22 Long Rifle. It has a 7 shot box type magazine. The Model 25M is in caliber .22 Magnum