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The Basics, Starting Out
Question: Reamer Dimensions vs Chamber Dimensions vs Case Dimensions
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<blockquote data-quote="ImBillT" data-source="post: 3054119" data-attributes="member: 117715"><p>Yes, but the overlap is perfectly acceptable in a number of actions, and is never dangerous to the user(okay I'm excluding self defense/LEO/military use because that's a different, albeit related issue). Excess space on the other hand is dangerous to the user, so if the company that spec'd the cartridge wants a .010" maximum tolerance between the ammo and chamber, and sets that at -.004" to +.006 because they think it's safe and functional, that's their decision. The company that brings out the cartridge is the company that submits the specs to SAAMI. The same company is usually the one who designs the initial firearms the cartridge is used in. Obviously the specs didn't bother Remington, and anyone designing a rifle based on the cartridge subsequently should know the AMMO spec, and design their rifle to function with any ammunition within the spec. It's quite simple, and it's not SAAMI's responsibility. A manufacturer can use any tolerance they desire, and if you don't like the results, you shouldn't buy from them.</p><p></p><p>SAAMI does not publish guidelines for a rifle manufacturer to follow and guarantee functionality. They publish dimensions and tolerances that the submitting manufacturer chooses. The primary reason is so that OTHER manufacturers CAN make products that function with in-spec ammo or with WELL DESIGNED in-spec firearms. All of the required information is there, and there is no need to change the published specs that you have mention. Any AR manufacture can make sure that their AR functions properly with any in-spec ammo. It's up to the rifle manufacturer to design and build a product that works. It's THAT simple. The manufacturer knows the ammo tolerance, and can easily make rifles that either have a chamber that accepts the ammo easily, or has a loading system that can deal with .004" crush. If they don't like it, it's their problem. Not SAAMI's, and not Remington's.</p><p></p><p>Any AR manufacturer can simply spec their chamber to be longer than the SAAMI minimum, and equal to the SAAMI maximum and the problem is solved. If a company isn't doing that, and their products have problems, it's the company that is at fault, not SAAMI.</p></blockquote><p></p>
[QUOTE="ImBillT, post: 3054119, member: 117715"] Yes, but the overlap is perfectly acceptable in a number of actions, and is never dangerous to the user(okay I'm excluding self defense/LEO/military use because that's a different, albeit related issue). Excess space on the other hand is dangerous to the user, so if the company that spec'd the cartridge wants a .010" maximum tolerance between the ammo and chamber, and sets that at -.004" to +.006 because they think it's safe and functional, that's their decision. The company that brings out the cartridge is the company that submits the specs to SAAMI. The same company is usually the one who designs the initial firearms the cartridge is used in. Obviously the specs didn't bother Remington, and anyone designing a rifle based on the cartridge subsequently should know the AMMO spec, and design their rifle to function with any ammunition within the spec. It's quite simple, and it's not SAAMI's responsibility. A manufacturer can use any tolerance they desire, and if you don't like the results, you shouldn't buy from them. SAAMI does not publish guidelines for a rifle manufacturer to follow and guarantee functionality. They publish dimensions and tolerances that the submitting manufacturer chooses. The primary reason is so that OTHER manufacturers CAN make products that function with in-spec ammo or with WELL DESIGNED in-spec firearms. All of the required information is there, and there is no need to change the published specs that you have mention. Any AR manufacture can make sure that their AR functions properly with any in-spec ammo. It's up to the rifle manufacturer to design and build a product that works. It's THAT simple. The manufacturer knows the ammo tolerance, and can easily make rifles that either have a chamber that accepts the ammo easily, or has a loading system that can deal with .004" crush. If they don't like it, it's their problem. Not SAAMI's, and not Remington's. Any AR manufacturer can simply spec their chamber to be longer than the SAAMI minimum, and equal to the SAAMI maximum and the problem is solved. If a company isn't doing that, and their products have problems, it’s the company that is at fault, not SAAMI. [/QUOTE]
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The Basics, Starting Out
Question: Reamer Dimensions vs Chamber Dimensions vs Case Dimensions
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