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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
necking down 7saum to 6.5 gap
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<blockquote data-quote="Deviant" data-source="post: 1478949" data-attributes="member: 106404"><p>I just finished doing 100 Bertram 7 RSAUM down to 6.5 SAUM and I did indeed have to trim the false shoulder off. I trimmed to .0145 which didn't remove a lot from the neck but did from the new hump at the shoulder junction. I was worried at first that I was turning too far in but in reality I probably should go deeper. I may have to use a reamer and remove doughnuts after the first firing. I just didn't want to take a chance and ruin $170 worth of brass by going too deep since this was my first time necking down to a new caliber. It was a simple process with my Whidden full length sizer and a Sinclair Neck turning mandrel to open them back up before trimming to length and neck turning.</p><p></p><p>Al</p></blockquote><p></p>
[QUOTE="Deviant, post: 1478949, member: 106404"] I just finished doing 100 Bertram 7 RSAUM down to 6.5 SAUM and I did indeed have to trim the false shoulder off. I trimmed to .0145 which didn't remove a lot from the neck but did from the new hump at the shoulder junction. I was worried at first that I was turning too far in but in reality I probably should go deeper. I may have to use a reamer and remove doughnuts after the first firing. I just didn't want to take a chance and ruin $170 worth of brass by going too deep since this was my first time necking down to a new caliber. It was a simple process with my Whidden full length sizer and a Sinclair Neck turning mandrel to open them back up before trimming to length and neck turning. Al [/QUOTE]
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necking down 7saum to 6.5 gap
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