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Rifles, Reloading, Optics, Equipment
Reloading
Is powder residue on should & neck a safety issue?
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<blockquote data-quote="str8shoot" data-source="post: 508144" data-attributes="member: 26034"><p>I was getting powder residue on a newly rebuilt 7 mag. It turned out my chamber was a little rough. Yours doesn't seem to show the signs of a rough chamber. I bet it is the powder. A faster powder will expand that case faster (before the burning powder comes up the case neck). I think that load actually needs a little more pressure.</p><p>Retumbo is a pretty slow powder for the 7 mag. It works well for the heavy bullets. I prefer h-1000 to retumbo and I shoot mostly 160-180s in my 7mags. If I were gonna try some 150s I'd use H-4831, it seems to work pretty well with most weights.</p><p>Hodgdon lists a max load of 72.5 gr Retumbo with a 150 partition. I really think you are under pressure with that load, have you tried higher charges of Retumbo? Do you haven't any other powders on hand to try?</p><p></p><p></p><p>As far as bumping the shoulder, I actually had to grind down the bottom of my die to be able to bump my shoulder just .002. I removed enough material that my shell holder wouldn't touch the die when it is set up correctly.</p><p>Hope any of this helps.</p></blockquote><p></p>
[QUOTE="str8shoot, post: 508144, member: 26034"] I was getting powder residue on a newly rebuilt 7 mag. It turned out my chamber was a little rough. Yours doesn't seem to show the signs of a rough chamber. I bet it is the powder. A faster powder will expand that case faster (before the burning powder comes up the case neck). I think that load actually needs a little more pressure. Retumbo is a pretty slow powder for the 7 mag. It works well for the heavy bullets. I prefer h-1000 to retumbo and I shoot mostly 160-180s in my 7mags. If I were gonna try some 150s I'd use H-4831, it seems to work pretty well with most weights. Hodgdon lists a max load of 72.5 gr Retumbo with a 150 partition. I really think you are under pressure with that load, have you tried higher charges of Retumbo? Do you haven't any other powders on hand to try? As far as bumping the shoulder, I actually had to grind down the bottom of my die to be able to bump my shoulder just .002. I removed enough material that my shell holder wouldn't touch the die when it is set up correctly. Hope any of this helps. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Is powder residue on should & neck a safety issue?
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