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Rifles, Reloading, Optics, Equipment
Reloading
Trimming before or after fireforming?
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<blockquote data-quote="varmintH8R" data-source="post: 772825" data-attributes="member: 39801"><p>Are you fireforming for an improved chamber or just refering to getting virgin brass fireformed to your exact chamber?</p><p></p><p>In the case of an improved chamber, I trim to the listed "trim-to" length of the parent cartridge, firm form, bump the shoulder, neck size, and then trim to the listed "trim-to" of the improved cartridge if necessary.</p><p></p><p>If you are just fireforming virgin brass to your chamber (not improved) you may want to try this:</p><p></p><p>Determine your shortest piece of brass and make sure it is in-spec (longer than trim-to, shorter than max length). Trim all your brass to that length. After fireforming and sizing, you can then trim them all to listed "trim-to". Of course, you can always just trim them all to listed "trim-to" after every firing/sizing, and then you are guaranteed consistent.</p><p></p><p>Just make sure they are in spec - that is more important than anything!</p></blockquote><p></p>
[QUOTE="varmintH8R, post: 772825, member: 39801"] Are you fireforming for an improved chamber or just refering to getting virgin brass fireformed to your exact chamber? In the case of an improved chamber, I trim to the listed "trim-to" length of the parent cartridge, firm form, bump the shoulder, neck size, and then trim to the listed "trim-to" of the improved cartridge if necessary. If you are just fireforming virgin brass to your chamber (not improved) you may want to try this: Determine your shortest piece of brass and make sure it is in-spec (longer than trim-to, shorter than max length). Trim all your brass to that length. After fireforming and sizing, you can then trim them all to listed "trim-to". Of course, you can always just trim them all to listed "trim-to" after every firing/sizing, and then you are guaranteed consistent. Just make sure they are in spec - that is more important than anything! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Trimming before or after fireforming?
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