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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Need some very quick help on shortening case bodies
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<blockquote data-quote="7mmRHB" data-source="post: 208172" data-attributes="member: 3584"><p>Scott, I have done pretty much the same process that you are attempting but with a full 300 RUM case. You cannot move the shoulder back .300 with one form die, annealed or not!! My form die set has three form dies and a full length sizing die.The shoulder must be pushed back in stages from the outside so there is someplace for the brass to flow to. The third die gives you the new neck ( thats about 1/2" too long )which needs to be cut off and requires inside neck reaming at that point to get rid of the Donut at the neck shoulder junction. Now you anneal and full length size, trim to length and neck turn. The necks need to be turned because of all the added brass that flows in during the forming process. 300 WSM brass is already very thick in the neck before you even started the forming. About .018 to .020 I beleive.</p><p></p><p>GG once posted a pic of the steps in forming my 7mmrhb wildcat on LRH but I don't have the skills to go locate it. Maybe someone can retrieve the pics for you but it won't help you solve your own problems if you're in need of quick help as you've stated. Good luck----7mmRHB</p></blockquote><p></p>
[QUOTE="7mmRHB, post: 208172, member: 3584"] Scott, I have done pretty much the same process that you are attempting but with a full 300 RUM case. You cannot move the shoulder back .300 with one form die, annealed or not!! My form die set has three form dies and a full length sizing die.The shoulder must be pushed back in stages from the outside so there is someplace for the brass to flow to. The third die gives you the new neck ( thats about 1/2" too long )which needs to be cut off and requires inside neck reaming at that point to get rid of the Donut at the neck shoulder junction. Now you anneal and full length size, trim to length and neck turn. The necks need to be turned because of all the added brass that flows in during the forming process. 300 WSM brass is already very thick in the neck before you even started the forming. About .018 to .020 I beleive. GG once posted a pic of the steps in forming my 7mmrhb wildcat on LRH but I don't have the skills to go locate it. Maybe someone can retrieve the pics for you but it won't help you solve your own problems if you're in need of quick help as you've stated. Good luck----7mmRHB [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Need some very quick help on shortening case bodies
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