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Rifles, Reloading, Optics, Equipment
Reloading
Necking up or down??
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<blockquote data-quote="mountainman" data-source="post: 491673" data-attributes="member: 30120"><p>If you were to size down the 300 case to the 7mm case like your asking about it will not have the exact shape of the factory 7mm case but it will chamber. so fireforming( shootform) the case by chambering the sized down, neckeddown case and shoot it to form it to the chamber and factory case shape. If you size a 300 case down to 7mm and compair it to the factory 7mm case you will see what I'm talking about. The cases wont be the same shape but very close, when you fireform or shootform the cases will be the same shape. It's really nothing more then shapeing the shoulder and squaring out the corners. It's very safe and easy to do, use a reduced load to make it easier on your brass and extend the brass life. After fireforming just check the brass lenght and trim if needed.</p></blockquote><p></p>
[QUOTE="mountainman, post: 491673, member: 30120"] If you were to size down the 300 case to the 7mm case like your asking about it will not have the exact shape of the factory 7mm case but it will chamber. so fireforming( shootform) the case by chambering the sized down, neckeddown case and shoot it to form it to the chamber and factory case shape. If you size a 300 case down to 7mm and compair it to the factory 7mm case you will see what I'm talking about. The cases wont be the same shape but very close, when you fireform or shootform the cases will be the same shape. It's really nothing more then shapeing the shoulder and squaring out the corners. It's very safe and easy to do, use a reduced load to make it easier on your brass and extend the brass life. After fireforming just check the brass lenght and trim if needed. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Necking up or down??
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