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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Secondary Explosion Effect? Or.....?
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<blockquote data-quote="Max Heat" data-source="post: 853229" data-attributes="member: 43153"><p>You may also want to try seating the bullets deeper into the cases. The 7RUM internal pressures are difficult to control, if loaded too close to the rifling lands.</p><p></p><p>I'm leaning AGAINST believing that your problems are due to running loads that are too light, because I have loaded all of the way down to 75gr without issue, for purposes of directly comparing performance to my 7RM using the exact same loads. Just for the record, the 75 gr loads fell way short on velocity, compared to the same loads in the RM. But also, you state that once-fired brass does not ever exhibit the problem.</p><p></p><p>You aren't trimming/chamfering, or de-burring, the ID of the never-fired cases before you shoot them once, are you?</p></blockquote><p></p>
[QUOTE="Max Heat, post: 853229, member: 43153"] You may also want to try seating the bullets deeper into the cases. The 7RUM internal pressures are difficult to control, if loaded too close to the rifling lands. I'm leaning AGAINST believing that your problems are due to running loads that are too light, because I have loaded all of the way down to 75gr without issue, for purposes of directly comparing performance to my 7RM using the exact same loads. Just for the record, the 75 gr loads fell way short on velocity, compared to the same loads in the RM. But also, you state that once-fired brass does not ever exhibit the problem. You aren't trimming/chamfering, or de-burring, the ID of the never-fired cases before you shoot them once, are you? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Secondary Explosion Effect? Or.....?
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