Ruger firearms dating
The cartridge case seals a firing chamber in all directions excepting the bore. The primer compound deflagrates, it does not detonate (that is, it rapidly burns, but does not explode).A jet of burning gas from the primer ignites the propellant.The Blue Book of Used Gun Values offers serial numbers for the following makers: AYA, Boss & Co., Ltd, Browning, EJ Churchill, Colt, Colt Black Powder 2nd Gen, John Dickson & Son, AH Fox, German early Date Codes, German Modern Date Codes, Stephen Grant, WW Greener, Harrington & Richardson, High Standard, Holland & Holland, Italian Year of Mfg.Date Codes, Ithaca Gun Co., Charles Lancaster, Joseph Lang, Marlin Firearms, Mauser Broomhandles, Parker Brothers Shotguns, Piotti, James Purdey, Remington Date Code & Sx S Shotguns, Savage/Stevens, LC Smith, Smith & Wesson, Spanish Year of Mfg.Modern primers are shock sensitive chemicals enclosed in a small (a few mm) capsule, ignited by percussion.In some instance ignition is electricity-primed, and there may even be no primer at all in such design (the propellant being directly ignited). the propellant, for example gunpowder or cordite;4.Military and commercial producers continue to pursue the goal of caseless ammunition.
One that is completely inert (contains no active primer and no propellant) is called a dummy.
This solid propellant residue can make extraction of fired cases difficult.
This is less of a problem for small arms of the former Warsaw Pact nations, which were designed with much larger chamber tolerances than NATO weapons.
Steel is less expensive than brass, but it is not feasible to reload and reuse steel cases.
Military forces typically consider small arms cartridge cases to be disposable, one-time-use devices.
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The neck and body portion of a brass case is easily annealed to make the case ductile enough to allow reforming so that it can be reloaded many times.