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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 Norma Mag
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<blockquote data-quote="MontanaRifleman" data-source="post: 860698" data-attributes="member: 11717"><p>Without trying to badger you, the bottom line IMO is that a 300 Norma Mag is not going to get anywhere close to 2500 rounds of accuracy... accuracy meaning if you start shooting 1/2 MOA with it, it's probably going to open up to greater than .7 MOA long before 2000 rounds if you're shooting 65,000 psi</p><p></p><p>The only way a case design will increase barrel life is to lengthen the neck and sharpen the shoulders. But even that benefit is limited. When you torch your throat and bore with heat and pressure, it is going to have an affect on the steel. The 300 Norma Mag has a moderately long neck but only a 20* shoulder. There is really little to nothing about the case design that is conducive to long accuracy life.</p><p></p><p>I'm sure it's a fine cartridge, although I think it would be better with a 30* or sharper shoulder.</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 860698, member: 11717"] Without trying to badger you, the bottom line IMO is that a 300 Norma Mag is not going to get anywhere close to 2500 rounds of accuracy... accuracy meaning if you start shooting 1/2 MOA with it, it's probably going to open up to greater than .7 MOA long before 2000 rounds if you're shooting 65,000 psi The only way a case design will increase barrel life is to lengthen the neck and sharpen the shoulders. But even that benefit is limited. When you torch your throat and bore with heat and pressure, it is going to have an affect on the steel. The 300 Norma Mag has a moderately long neck but only a 20* shoulder. There is really little to nothing about the case design that is conducive to long accuracy life. I'm sure it's a fine cartridge, although I think it would be better with a 30* or sharper shoulder. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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300 Norma Mag
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