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Rifles, Reloading, Optics, Equipment
Reloading
primer cratering 7mm ultra mag
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<blockquote data-quote="speedbump" data-source="post: 180215" data-attributes="member: 547"><p>Kirby is right on the money about the size of the firing pin hole in a boltface. One of the 1st pressure signs to look for with the 7mmRUM is noticably sharper recoil, a shiny case head, and increased bolt lift. Next is ejector stamping, very stiff bolt lift, and more pronounced primer flattening / cratering. That should be MORE than enough clues to stop, and back the heck off. </p><p></p><p>When working up loads, try using moly grease or the old G.I. grease on the locking lugs. It really helps prevent galling and eases bolt lift.</p></blockquote><p></p>
[QUOTE="speedbump, post: 180215, member: 547"] Kirby is right on the money about the size of the firing pin hole in a boltface. One of the 1st pressure signs to look for with the 7mmRUM is noticably sharper recoil, a shiny case head, and increased bolt lift. Next is ejector stamping, very stiff bolt lift, and more pronounced primer flattening / cratering. That should be MORE than enough clues to stop, and back the heck off. When working up loads, try using moly grease or the old G.I. grease on the locking lugs. It really helps prevent galling and eases bolt lift. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
primer cratering 7mm ultra mag
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