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The Range
Ammo & Reloading
Please explain +P ammo
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<blockquote data-quote="Rod Snell" data-source="post: 1447596" data-attributes="member: 796"><p>Braggs, here's the deal on the pressure ratings.</p><p>SAAMI is the shooting organization that "keeps the books" on the various standards and practices of the industry in the US.</p><p>For each cartridge, there is a standard size and pressure. For some cartridges, there is a +P pressure rating that is more than the cartridge standard. However, not all +P are created equal. A +P .38 Spl is much lower in pressure than a +P 9mm Luger. A 7mm rifle cartridge is higher pressure than either.</p><p>7mm-08 61,000 38 S&W 14,500 </p><p></p><p> 9mm Luger 35,000 </p><p>7mm BR 52,000 cup 9mm Luger +P 38,500 </p><p></p><p>70-30 Waters 45,000 38 Special 17,000 </p><p>7.62x39 45,000 38 Special +P 20,000 </p><p>8mm Mauser 35,000 38 Super +P 36,500 </p><p>8mm Rem Magnum 65,000 357 Magnum 35,000 </p><p>22-250 Remington 65,000 357 Maximum 40,000 </p><p>222 Remington 50,000 40 S&W 35,000 </p><p>Pressure in PSI.</p><p><a href="http://www.handloads.com/misc/saami.htm" target="_blank">http://www.handloads.com/misc/saami.htm</a></p><p></p><p>You will hear about +P+, which is often misunderstood.</p><p>There are no SAAMI standards for +P+, and the manufacturer loads it to whatever they choose. Some are a little over +P; some foreign +P+ is way over and dangerous to shoot in a handgun. </p><p></p><p>As to how many grains of powder are in a factory cartridge, there is no way to know because they use different powders and have extensive labs to make sure they meet SAAMI pressure standards.</p><p>The number printed on the box is the weight of the bullet.</p></blockquote><p></p>
[QUOTE="Rod Snell, post: 1447596, member: 796"] Braggs, here's the deal on the pressure ratings. SAAMI is the shooting organization that "keeps the books" on the various standards and practices of the industry in the US. For each cartridge, there is a standard size and pressure. For some cartridges, there is a +P pressure rating that is more than the cartridge standard. However, not all +P are created equal. A +P .38 Spl is much lower in pressure than a +P 9mm Luger. A 7mm rifle cartridge is higher pressure than either. 7mm-08 61,000 38 S&W 14,500 9mm Luger 35,000 7mm BR 52,000 cup 9mm Luger +P 38,500 70-30 Waters 45,000 38 Special 17,000 7.62x39 45,000 38 Special +P 20,000 8mm Mauser 35,000 38 Super +P 36,500 8mm Rem Magnum 65,000 357 Magnum 35,000 22-250 Remington 65,000 357 Maximum 40,000 222 Remington 50,000 40 S&W 35,000 Pressure in PSI. [url]http://www.handloads.com/misc/saami.htm[/url] You will hear about +P+, which is often misunderstood. There are no SAAMI standards for +P+, and the manufacturer loads it to whatever they choose. Some are a little over +P; some foreign +P+ is way over and dangerous to shoot in a handgun. As to how many grains of powder are in a factory cartridge, there is no way to know because they use different powders and have extensive labs to make sure they meet SAAMI pressure standards. The number printed on the box is the weight of the bullet. [/QUOTE]
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