Many primers for components come with a small disk of paper sandwiched between anvils and a mixing mixture for priming. It's called foil paper, and it covers the pellet used for priming. The anvil isn't visible in this image to make it clearer. Yes, those pesky little things that we cannot live without are hard to come by in the present. The problem will go away when this surge is similar to previous trends. We must be aware of a few lesser-known facts regarding primers before we get worried about not having enough. I'm sure that most readers are aware that 209 primers have many functions. In addition to giving a spark to ignite propellant, it gives an initial boost in pressure to help the propellant reach self-sustaining combustion. It is also part of the sealer system in the case that keeps hot gases behind the bullet and out of your face. U.S. handloaders have a choice of primer size and the purpose. There are distinct versions for handgun and rifle; within each category there are two sizes. It is crucial to think about the size of your businessThe first thing to note is that is: Though Small Rifle primer pockets and Small Pistol primer pockets have the same dimensions, Large Rifle primers and Large Pistol primers differ. The standard pocket of a Large Pistol primer is somewhat deeper than its Large Rifle counterpart, specifically, 0.008 to 0.009 inch less. It was discovered by a lot of handloaders as the "mega-magnum", handgun cartridges, first appeared couple of years back. The original cases were designed to accommodate Large Pistol primers. Reloaders who were reloading decided to change to Large Rifle primers to better manage the pressures that were high, and they found the rifle primers were a bit too high on the case head, which was an undesirable situation in the high-recoil revolver cartridge. Primer Equivalency Many articles have been written on the differences in primer brands. Since the beginning, there have been tests conducted to examine the effects on the effect of primer replacement. I've been a lab rat for long enough to know that the road is filled with potholes. A number of people requested that I include the primer chart in my Speer manuals that lists the primer types that each maker uses. You will not find such charts in my books. Why? It could lead to an unsafe scenario if we swap primer brands apart from those listed in the manual. Another issue is the accuracy of information. One of the Speer manuals I read before taking over, printed a beautiful diagram of the size of primers as well as manufacturers' numbers. Almost before the first printing was sold out, one company completely changed its system of numbering and the foreign brand was not listed. Hardcover books are similar to engraving stuff in stone, and I didn't want charts that could become obsolete before the book ran its course, causing issues. For the "which is hotter/colder" debate, a similar conundrum is present: a change in primer specifications. CCI changed the whole primer line in the year 1989. While we made sure that the new primers could use load data from earlier versions, not all of the changes were made public. Another time, shortly after a writer friend of mine participated in a shoot at the lab, a complete series of rifle ammo , with the sole difference being primers, another primer maker came up with a change that had an impact on the results of that test. Here's an illustration of an error printed in the manual being taken as gospel. A list of primer types and numbers was included in a reloading manual for another company. It incorrectly indicated that the CCI Benchrest primer could be interchangeable with the CCI Magnum primer. The error was repeated through many editions of the manual until we finally convinced CCI to change their position. Some would contact CCI and insist that the Benchrest primer was an Magnum since it was published this way in the manual of another company. Magnum Primers: Use As Instructed Numerous primer companies offer the standard and Magnum version of their primers in every size and for every application. The Magnum primer is more powerful for difficult ignition scenarios. A large-capacity case, a highly deterred propellant, or extremely cold weather (less than 20°F) usually makes 209 primers desirable. Bottom line If I make a primer performance equivalence chart now, it's likely to be outdated and some sloppy nut might try to replace primers based on invalid information. I am sorry to the kind person who wrote to my editor recommending I conduct an equivalence test for handgun primers, but it can lead to too much grief. Use current and published load recipes.The Mysteries of the All-Important Primer A lot of component primers come with a small disk of paper sandwiched between anvils and a priming mixture. It's called foil paper and covers the priming pellet. The view will be clearer without the anvil. It is indeed difficult to find the small things that we cannot live without at the moment. It will pass if this rush is like the past trend. Let's talk about some of the less-known facts about primers, while we think about whether or not we have enough. The majority of readers know that the 209 primers perform more than one task. Apart from creating a spark that ignites propellant, it gives an initial increase in pressure that helps the propellant reach an auto-sustaining flame. It's also part of the sealer system in the case that helps keep hot gases behind the bullet away from your eyes. U.S. handloaders have a selection of sizes for primers and the purpose. There are different versions for rifle and handgun Within each category, there are two sizes. It is essential to take into consideration the size of your company The first bit of useful information is that, even though Small Rifle and Small Pistol primer pockets share the same depth, Large Rifle and Large Pistol primers do not. Large Pistol primers have a standard pocket that is 0.008 to 0.09 inches smaller than their Large Rifle counterparts. It was discovered by many handloaders as the "mega-magnum", handgun cartridge, came out just a few years back. The first cases were created to accommodate Large firearm. Some reloaders decided to change to Large Rifle primers to better manage the pressures that were high, and they found the rifle primers affixed to the head of the case, which is which is a problem in a revolver with a high-recoil cartridge. Primer Equivalency There are a myriad of articles written about how various types of primers compare. Tests to compare the effects of primer substitutions have been written about for years. Because I was an experimenter for so long I'm aware that the path to success isn't without bumps. We received a lot of requests to add a primer chart in the Speer manuals that I created to show what the different primer makers refer to their primer kinds. It is important to note that there aren't these charts in my books. What's the reason? In the first place, it can result in a hazardous situation if we switch primer brands apart from those listed that are listed in the manual. The other concern is the accuracy of information. One of the last Speer manuals I read before taking over printed a nice chart of the sizes of primers and the manufacturer's numbers. Before the first print was gone, a company completely changed its numbers, and a foreign brand that was listed went out of business. Hardcover books are akin to engraving things in stone and I didn't want to have a chart that would be outdated prior to the book running its course, causing issues. Similar to the debate over "which is hotter/colder" There is the same issue with primer specification changes. CCI overhauled the whole primer line in the year 1989. We took care to make sure that the new primers were able to use load data that was created by the previous versions, however there is no way to announce every change. Another example is when another primer manufacturer introduced a change that altered the outcome of a test conducted by a close friend of mine. Here's an example of a mistake printed in a manual being taken as gospel: Another company's reloading manual had an alphabetical list of primer numbers and primer types, which incorrectly listed the CCI Benchrest primer as being interchangeable with the CCI Magnum primer. The error was repeated over multiple editions of that manual until we persuaded that company to correct the error. CCI would be called by people who demanded that the Benchrest primer was not a Magnum because it was published in a different guide published by a different company. Magnum Primers: Use according to the Direction The majority of primer manufacturers offer the standard and Magnum primer in every size and application. The Magnum primer has more power for difficult ignition situations. A huge capacity case, an extremely dispersed propellant, or cold temperatures (less than 20 degrees Fahrenheit) typically makes the 209 primers desirable. Conclusion If I make an equivalence chart of primer performance now, it's likely to be obsolete, and some sloppy nut might try to replace primers based on invalid information. I am sorry to the kind person who recently wrote my editor suggesting I do a handgun primer equivalence test however, it could lead to too much grief. Keep to the latest and published load recipes.
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