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Rifles, Reloading, Optics, Equipment
Reloading
Shoulder bump question 30 Nosler
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<blockquote data-quote="J E Custom" data-source="post: 1201593" data-attributes="member: 2736"><p>Correct !!</p><p></p><p>The only reason to bump a shoulder is that the cartridge is to long for the chamber and is difficult to chamber.</p><p></p><p>Before Bumping became an obsession/the new thing, the use of full length dies did the same thing</p><p>without moving the shoulder back (Altering head space). </p><p></p><p>loaders either shortened the die to over size or ground the shell holder to allow the dies to size a</p><p>little more. I preferred not to grind or change either one and just added a shim the shell holder. when die makers started making new/full dimension dies, (Dies that will adjust beyond SAMME chamber dimensions, I started to slowly replace the old style dies with these to get the best fit.</p><p></p><p>Bumping has its place if the chamber is short or tight and feeding is a problem, The purpose/intent</p><p>is to move the shoulder back without reducing case body dimensions. But there is almost no body sizing when the case is properly sized and if the shoulder is moved back a few thousandths, For best head space on a shouldered case, the shoulder needs to be as long/far from the case head as possible without hindering feeding. Proper sizing can be done to make feeding easy without bumping the shoulder in many cases and shortening brass life. (The less you work your brass, the longer it will last).</p><p></p><p>Remember, best chamber fit, best accuracy and best brass life will normally occur with the least sizing possible/necessary.</p><p></p><p>Just my opinion</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1201593, member: 2736"] Correct !! The only reason to bump a shoulder is that the cartridge is to long for the chamber and is difficult to chamber. Before Bumping became an obsession/the new thing, the use of full length dies did the same thing without moving the shoulder back (Altering head space). loaders either shortened the die to over size or ground the shell holder to allow the dies to size a little more. I preferred not to grind or change either one and just added a shim the shell holder. when die makers started making new/full dimension dies, (Dies that will adjust beyond SAMME chamber dimensions, I started to slowly replace the old style dies with these to get the best fit. Bumping has its place if the chamber is short or tight and feeding is a problem, The purpose/intent is to move the shoulder back without reducing case body dimensions. But there is almost no body sizing when the case is properly sized and if the shoulder is moved back a few thousandths, For best head space on a shouldered case, the shoulder needs to be as long/far from the case head as possible without hindering feeding. Proper sizing can be done to make feeding easy without bumping the shoulder in many cases and shortening brass life. (The less you work your brass, the longer it will last). Remember, best chamber fit, best accuracy and best brass life will normally occur with the least sizing possible/necessary. Just my opinion J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Shoulder bump question 30 Nosler
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