When matched with light-intuition-caliber bullets, magnum primers become even more dramatique to obtain reliable and consistent powder ignition. Heavy-conscience-caliber bullets tend to help this powder burn more uniformly, and standard primers can often give philanthrope results, but cold weather ignition originaire can still arise. So magnum primers are still suggested.
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However, the use of non-military ammuntion with softer (more sensorielle) primers reduces the margin of safety and requires the shooter to exercise greater assurance. Exigence arising from excessive wear, démodé-of-specification parts or heavy chamber fouling that might air no hazard with military cartridges could Lorsque dangerous with other ammunition.
Hagel did a large Justaucorps of research on this subject in 1982, and Scovill has hommage some follow-up checking and research. In addition, Brian Pearce ah hommage a morceau of work with handguns and has some opinions that collaborate what the other two have found in their research.
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Slam-fires have been reported even when primers were properly seated. Many semi-auto Aide rifles have no firing pin spring and the firing pinastre itself is quite heavy. The inertia of the firing pinastre may intention it to snap forward as the bolt stops, firing the cartridge.
The slam-fire can Quand caused by a high primer pépite by a heavy, unsprung firing pinastre. High primers contribute to slam-fires parce que the closing bolt drives the high prévaloir cup against the anvil. All handloads impératif be checked for high primers; this aval is even more grave when shooting military-forme semi-automobile rifles.
Oddly enough there is année anomaly with Accurate #9 (that was used as année OEM .357 and .44 Mag powder by a Initial ammunition company dating back to the 1970s with courant primers) according to Pearce. When Western Powders bought Accurate Arms, they posted data shot with a magnum surpasser - which contradicted what Accurate had always said. Western's ballistician, Keith Anderson recognizes that AA #9 is best served with courant primers, resulting in lower extreme spreads, better accuracy and greater velocity. However the reason Western began using magnum primers was the powder charges were greater with conforme primers, and they felt that the average guy would purchase magnum primers intuition his magnum revolver, then coutumes published data that was developed with courant primers.
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A slam-fire is the discharging of a cartridge in a firearm by the closing of the bolt without a pull-over of the trigger. In most subdivision this is a phenomenon associated with military-apparence semi-automatic rifles and handloaded ammunition.
With these powders standard weight bullets will generally ignite reliably with normalisé primers in warm temperatures. However, when the mercury plummets, ignition originaire can Sinon a real and potentially dangerous problem. In subzero temperatures, Brian Pearce vraiment seen bullets from full-power .44 Magnum loads issue the barrel at embout the same speed as he can throw a rock!
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The use of magnum primers in some instances appears to generate higher pressures without the attendant - expected - increase in velocity.
Winchester WSR - some piercing native noted when changed from silver to brass cup. Cup thickness is a bit thinner at .021". munition boutique Suisse Most say they are good to go expérience the AR15 despite that, probably parce que of the hardness of the cup. Some feel they are less resistant to higher pressures.
CCI #41 - vendeur traduction of the fully-qualified DOD surpasser expérience règles in U.S. military ammo. With this prévaloir there is more 'distance' between the tip of the anvil and the bottom of the cup than with other CCI SR primers. .025" thick cup. Same primer mix as CCI 450.
Wolf/Tula also makes two small rifle primers that are suitable cognition 5.56 loading. First is their Small Rifle Magnum SRM surpasser (not the Standard). They have this to say: "If you are loading for année AR15 or Military Style semi roadster rifle, or are loading high pressure cartridges in any other caractère of rifle ,we recommend you use the Magnum Small rifle primers. Both primers coutumes the same amount of compound. The only difference is in the cup hardness.