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Primer For Ammunition - Remington's 1½ pistols are unique in the world of small guns. They are the only small guns I know of that come with a warning about their use in special gun systems. Most small guns come in two flavors, regular and magnum, the use of which usually depends on the powder one uses. Similarly, most gun powders ignite well enough with standard primers, while other gun powders, ball powders such as Hodgdon H110 and Winchester 296 for example, benefit from the extra spark of magnum primers to help them ignite better. Their uses would be easy to remember, the standard powder starters a, b and c, and the magnum powder starters x, y and z. But Remington's 1½- and 5½-caliber revolvers don't necessarily fall into a different category than the magnum that defines them. There is a special warning on the 1½ box indicating that they are not suitable for certain high pressure cartridges. The warning reads, “Do not use 1½-inch rifles chambered for high-powered rifle cartridges such as .357 Magnum, .357 SIG and .40 S&W. Damage to your firearm and/or personal injury may occur. ” The warning continues, “Contact Remington Arms at 800-243-9700 for a free catalog or visit our website: www.remington.com. Recommended IDs for each cartridge are listed in the design list tables. Of course, Remington's stocking tables list the recommended specifications for every model that Remington carries, rifles and pistols. 1½ tags are listed for 25 Auto, .32 S&W, .32 S&W Long, .32 Auto, .380 Auto, .38 S&W, .38 Short Colt and .38 Special. None of these cartridges exceed chamber pressure ratings of 25,000 psi peak. Interestingly, the 1½ primer is also listed for 9mm Luger, 9mm +P and .38 Super. These latter parts are not low pressure. The 9mm Luger has a SAAMI (Sporting Arms and Ammunition Manufacturers Institute) pressure rating of 35,000 psi, and the +P type limit is 38,500 psi. The .38 Super has a SAAMI pressure rating of 36,500 psi. These compare to the .357 Magnum and .40 S&W's pressure limit of 35,000 psi, and the .357 SIG's pressure limit of 40,000 psi. If a 1½ primer is not suitable for .357 Magnum and .40 S&W, how can it be suitable for 9mm, 9mm +P and .38 Super, which have similar pressures—or even more?

This has caused confusion among reloaders, myself included. Actually, I didn't know this warning when I first bought 1½ primers and used them in 9mm Luger loads. I thought 1½ starters were "regular" starters, and 5½ starters were "magnum" starters, since that's what most societies list. I was surprised when some of my 9mm loads with 1½ went through. My first instinct was to think that I had packed them too hot, perhaps by mistake. However, similar loads with other types of primers did not show any sign of overpressure. Why did Remington's predecessors react differently?

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At some point, I learned about Remington's warning. Then it made sense—they weren't designed to handle high pressure. Since then, I have used a 1½ primer in a 9mm Luja with mixed results. In some 9mm loads, the primers had no evidence of initial flow. In some cases, the 1½ primers had an initial flow while the other primer types did not. In negative cases, 1½ primers were cut.

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Remington recommended the use of the 1½ suggests a difference in cup thickness or cup strength such that the 1½ will not handle the same pressure as the 5½, or other types of small guns that do not have warnings about using them. special cartridges.

What happens when you use 1½ starters on loads you shouldn't? Excessive flow of the first metal can cause some of it to shear off and end up in the pin hole. This can block the firing pin, causing a misfire. Drilled starters can plug the pin hole immediately, and can cause erosion due to the hot, high-pressure gas. Gas leaks are bad news for your gun. A damaged firing pin will result in cracked primers, due to its uneven shape. There is also the possibility that you, the shooter, may face a blast of hot gas and metal face first. Obviously, this can have serious consequences, including eye damage. Always wear safety glasses when shooting anything!

Shots show the appearance of a typical piece with no flow, partial flow (marked with an arrow), and a strong flow shot where the pin is fully compressed.

Loads were assembled in 9mm Luger pistols to show how the 1½ primers responded to pressure. Winchester 124-grain FMJ bullets were loaded to 1.130 inches in three different sizes (5.0, 5.5 and 6.0 grains) for the Hodgdon CFE Pistol in Starline brass. Three cartridges were used, Remington 1½, 5½ and CCI 500.

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The CFE Pistol's minimum charge weight, 5.0 grains, is a moderate load. A 5.5 grain load is closer to a standard high pressure or +P load, depending on who you talk to. The first weight, 6.0 grains, is a +P+ load and is ONLY safe in guns designed to handle this type of pressure. It was included to measure the response of the primer to high pressure. DO NOT use this load in your 9mm pistol. Always follow the download data from the download directory.

All three primers gave similar velocities for a given mass. The 5½ primer gave more velocity (12+ fps) than the other 5.5 grain primers, but not by much with the other loads.

Velocity Chart: Ten shots fired per load. Velocity is an average of 10 shots and recorded with a Shooting Chrony 8-foot chronograph. The test gun was a Para Ordnance special rifle with a 5-inch Kart 9mm barrel.

Primer For Ammunition

At low charge densities, none of the primers had evidence of initial flow. The weight of the middle charger, five out of ten 1½ had the first flow. One of them was a strong primer flow, where the firing hole was completely blown. The 5½ primers have the least flow of the two primers. None of the CCI 500 precursors had a prior flow. At high weight, all the first products had the first flow. But only 1½ starters had excess flow that completely balanced the launch hole, although some starters were close to that. No primers were fired.

Should I Start Reloading My Own Ammo?

Remington 1½ primers are very pressure sensitive. They are more dependent on primer flow, and provide deeper primer flow when the pressure is higher than the others tested. However, they did not show evidence of primer flow at the lowest weight, which is the medium pressure weight. Since primer flow can be a problem, it is not the best choice for high pressure loads. If in doubt, test them with your load to see how they perform. I reduce the use of 1½ to 9mm primers to reduce pressure loads, reduce the possibility of primer flow and to drill a hidden hole. I have also used 1½ primers with good results in small .45 case primers. The pressure limit for the .45 Auto is 21,000 psi, which certainly qualifies as low pressure.

Remember Remington's recommendation of 1½ primers the next time you shop for primers. 1½ primers work well for low to moderate gun velocities, but if you are using high pressure, a different primer may be a better choice.

As a final note, Remington's 6½-caliber shotguns also come with a warning about their use in ammunition boxes. They say, "Do not use 6½ caliber handguns in high caliber cartridges such as .17 Rem., .222 Rem., and .223 Rem." The Remington catalog shows the 6½ listed only in .22 Hornet (49,000 psi) and .30 Carbine (40,000 psi) calibers. All other small pistols use 7½ primers. The Remington catalog can be found at: remington-catalog.com/catalogs/remington/2017. A downloadable PDF version can be found here: remington-catalog.com/catalogs/remington/2017/pdf/2017-Remington-Catalog.pdf

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