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Long Range Hunting & Shooting
7mm wsm brass question
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<blockquote data-quote="J E Custom" data-source="post: 1597711" data-attributes="member: 2736"><p>As HuntFarther said, Use 300 WSM brass and size in a 7 WSM die. take the case and try for fit in your chamber and when you have a .003 to .004 thousandths crush fit stop sizing. The case will feel tight, but the bolt will close (Just like doing an Ackley) This will hold the case firmley in place and allow it to fire form with minimum case stretch.</p><p></p><p>Both rounds are the same overall length, But the body of the 300 is .037 thousandths shorter so the shoulder is moved forward during fire forming.</p><p></p><p>As to the Bertram brass, if it is sized for the 7 WSM it will probably be ok</p><p>But when moving the shoulder forward It may not fire form properly because of its hardness . So i would buy any of the available brass like Winchester or Norma. The Norma is arround $1.00 a piece and the Winchester is around $.50c each when you can find it.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1597711, member: 2736"] As HuntFarther said, Use 300 WSM brass and size in a 7 WSM die. take the case and try for fit in your chamber and when you have a .003 to .004 thousandths crush fit stop sizing. The case will feel tight, but the bolt will close (Just like doing an Ackley) This will hold the case firmley in place and allow it to fire form with minimum case stretch. Both rounds are the same overall length, But the body of the 300 is .037 thousandths shorter so the shoulder is moved forward during fire forming. As to the Bertram brass, if it is sized for the 7 WSM it will probably be ok But when moving the shoulder forward It may not fire form properly because of its hardness . So i would buy any of the available brass like Winchester or Norma. The Norma is arround $1.00 a piece and the Winchester is around $.50c each when you can find it. J E CUSTOM [/QUOTE]
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7mm wsm brass question
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