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Rifles, Reloading, Optics, Equipment
Reloading
Question about Fire Forming 257 bobs into 257 AI
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<blockquote data-quote="grry10" data-source="post: 2215116" data-attributes="member: 35864"><p>I use the COW method to fire form my 257 Ackley and have yet to lose a case. If it is used 257 Roberts brass I anneal first. New brass I skip this step. Step 1, run brass through 257 AI sizing die. Step 2, prime with magnum large pistol primers. Step 3, charged with 14 grains of Bullseye pistol powder. Step 4, top with Cream of Wheat to the base of the neck. I use a Lee hand measure for this step. Step 5, poke 1/4 of a sheet of toilet paper into the neck to hold everything in. Step 6, go outside, chamber, and fire each round to blow out the case. The cases come out formed with a slight rounding at the shoulder angle, but the cases have the capacity of the Ackley and you are ready to start developing your test loads. The sharp shoulder angles will form the first time you fire them using your test loads. For me, the COW method saves on brass, powder, bullets, and barrel live. I use it in .257 Ackley, 6.5-06 Ackley, and 338-06 Ackley (6.5 and 338 require extra depending on parent cartridge used.</p></blockquote><p></p>
[QUOTE="grry10, post: 2215116, member: 35864"] I use the COW method to fire form my 257 Ackley and have yet to lose a case. If it is used 257 Roberts brass I anneal first. New brass I skip this step. Step 1, run brass through 257 AI sizing die. Step 2, prime with magnum large pistol primers. Step 3, charged with 14 grains of Bullseye pistol powder. Step 4, top with Cream of Wheat to the base of the neck. I use a Lee hand measure for this step. Step 5, poke 1/4 of a sheet of toilet paper into the neck to hold everything in. Step 6, go outside, chamber, and fire each round to blow out the case. The cases come out formed with a slight rounding at the shoulder angle, but the cases have the capacity of the Ackley and you are ready to start developing your test loads. The sharp shoulder angles will form the first time you fire them using your test loads. For me, the COW method saves on brass, powder, bullets, and barrel live. I use it in .257 Ackley, 6.5-06 Ackley, and 338-06 Ackley (6.5 and 338 require extra depending on parent cartridge used. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Question about Fire Forming 257 bobs into 257 AI
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