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Centerfire Rifle Cartridge Reloading Primer Selection:
 The centerfire rifle cartridge is aptly named because the cartridge ignition source is a primer located in the center of the cartridge casings web.

 The type of primer used in American manufactured ammuntion is boxer, which have an internal anvil and small explosive charge that when struck by a firing pin ignites, the flame travels through the flash hole in the cartridge case web and enters the case body where the main powder charge is then ignited.

 The two standard primer sizes for metallic centerfire rifle cartridges are small rifle which are .175" diameter and large rifle which are .210" diameter.

Small Rifle Primers (.175" Diameter):
 Small Rifle: Is used for most rifle cartridges requiring a small rifle primer.
 Small Rifle Magnum: Is generally used for heavy loads and ball propellants.

Large Rifle Primers (.210" Diameter):
 Large Rifle: Is used for most rifle cartridges requiring a large rifle primer.
 Large Rifle Magnum: Is generally used for large case capacity rifle cartridges, or when using ball propellants.

Rifle Cartridge Primer Reloading:
 Primers directly affect accuracy more than most people or reloaders realize. The primer is the only component in a cartridge that sets off a chain reaction of events. The first thing that the primer does is start the bullet moving out of the cartridge case and at the same time it ignites the powder charge which in turn pushes the bullet out of the barrel.

 Some of the things that can dictate a certain primer usage are extremely hard or soft bullets, bullet seating depth, powder selection by burn rate and or amounts of powder used in the case.

 Rifle primers are not the same by any means, there is a difference in the length of time which primers burn. Primers can be selected by heat or pressure range of which there are three fairly distinct and can vary between individual lots produced. Always keep in mind that between primers there can be a hi-lo pressure difference of approximately 12%, when changing primers on a load always start at the start load and work up again.

 Just remember when it comes to custom handloading of rifle cartridges there is nothing cast in stone, it is all a matter of trial and error for each individual rifle.

Centerfire Rifle Cartridges:
17 Rem. - 204 Ruger - 22 Hornet - 222 Rem.
223 Rem. - 22-250 Rem. - 220 Swift - 223 WSSM
243 Win. - 6mm Rem. - 243 WSSM - 240 Wby. Mag.
250 Savage - 257 Roberts - 25 WSSM - 25-06 Rem.
257 Wby. Mag. - 6.5 x 55mm - 260 Rem.
6.5mm Rem. Mag. - 264 Win. Mag. - 6.8mm Rem.
270 Win. - 270 WSM - 270 Wby. Mag. - 7mm-08 Rem.
280 Rem. - 7mm Rem. Mag. - 7mm WSM
30-30 Win. - 308 Win. - 30-06 Springfield
300 Win. Mag. - 300 WSM - 300 Wby. Mag.
325 WSM - 338 Win. Mag. - 340 Wby. Mag.
357 Mag. - 44 Mag. - 444 Marlin - 45-70 Government
Fast And Precise Priming Tools:

Resources And References:
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