Large Pistol Magnum Primers

Using Large Pistol Magnum Primers

The main difference between each of the primer types is the heat that they produce. Large pistol magnum primers create a hot, long lasting spark. These primers ignite hard to light powders like many of the ball powders, such as the 296, H-110, AAC#9. Since large pistol magnum primers are hotter than standard primers, they are typically recommended to be used with ball powders, especially when loading large capacity cases, or when using cartridges at temperatures below 20 degrees Fahrenheit. Since ball powders are usually harder to ignite than other powders, magnum primers are often needed. As always, when you are utilizing reloading supplies, your reloading manual should guide you towards which primer would be the best for your situation.

Large pistol magnum primers are not needed for light to mid range loads in some cartridges. Many times, you’ll have to work with a specific combination of various powders and primers for optimal results in your reloading supplies. These combinations are often outlined in primer recipes that are included in the manuals that come with large pistol magnum primers.  Large pistol magnum primers are made in two ways: either a standard chemical mix is used to create a flame that burns longer, or a custom mix is created that produces more aggressive burn characteristics.

Using a large pistol magnum primer improperly will almost always result in dangerously heightened firing pressures. Thus, it is extremely important to follow the manual that comes with the primer and/or your cartridge. Most primer producing companies offer a standard and a Magnum primer for every cartridge size and application. Large pistol magnum primer is mainly used to ignite powder that presents more challenging ignition.  Thus, large pistol magnum primer would be optimal for any large capacity case, or in any situation where cold weather may make ignition more difficult.

As always, primers should be stored separately in their own cases, which are specifically designed for safety.  When it comes to your reloading supplies, do not use primers in any other way other than the manner in which you’re directed to do so by your reloading manual.