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Rifles, Reloading, Optics, Equipment
Reloading
How tight do you size the neck of a SAMMI chamber
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<blockquote data-quote="Varmint Hunter" data-source="post: 1045082" data-attributes="member: 313"><p>I wasn't too sure exactly what you were asking in your original post. However, if you are neck turning, it would be a good idea to know what the specific neck diameter of your chamber is. Too much clearance between the loaded round neck diameter and the chamber neck isn't normally conducive to the best accuracy and thinning necks more than necessary will likely shorten brass life.</p><p>IMO, when using high quality brass in a factory SAMMI chamber, neck turning is completely unnecessary and may even be counterproductive.</p><p>However, if you are intent on neck turning, then a minimum amount of turning that removes no more than 25% (highest spots) of the circumference would probably be best.</p><p>As indicated above, a bushing that is .002-.003 smaller than your loaded round neck diameter is good. That would mean that you need to turn necks first, keeping in mind that different lots or manufacturers often have different neck thicknesses to begin with. More than one bushing may be necessary.</p></blockquote><p></p>
[QUOTE="Varmint Hunter, post: 1045082, member: 313"] I wasn't too sure exactly what you were asking in your original post. However, if you are neck turning, it would be a good idea to know what the specific neck diameter of your chamber is. Too much clearance between the loaded round neck diameter and the chamber neck isn't normally conducive to the best accuracy and thinning necks more than necessary will likely shorten brass life. IMO, when using high quality brass in a factory SAMMI chamber, neck turning is completely unnecessary and may even be counterproductive. However, if you are intent on neck turning, then a minimum amount of turning that removes no more than 25% (highest spots) of the circumference would probably be best. As indicated above, a bushing that is .002-.003 smaller than your loaded round neck diameter is good. That would mean that you need to turn necks first, keeping in mind that different lots or manufacturers often have different neck thicknesses to begin with. More than one bushing may be necessary. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How tight do you size the neck of a SAMMI chamber
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