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Rifles, Reloading, Optics, Equipment
Reloading
Pressure signs/chronographing
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<blockquote data-quote="glassman" data-source="post: 206426" data-attributes="member: 6503"><p>280,</p><p>Your question:</p><p><em>I have to ask how you know your max loads? Are you saying just stopped at a certain point you though safe and called it max, or are you saying you know it's a max pressure or velocity load?</em></p><p><strong>When the bolt starts to get tight, that's the one main indicator. But of course there are other things too. I also use a RCBS Precision Mic to check the headspace.</strong></p><p></p><p><em>Do you keep adding powder until you see pressure signs then back off, or what?</em></p><p><strong>That is correct? That's exactly how I've done it for 34 yrs now. I would imagine that is pretty much how most people have done it to, especially if they don't have a chronograph.</strong></p><p></p><p><em>do you simply use the "max powder charge" from the book?</em></p><p><strong> I use it only for a guide. The 'max" charge in one manual is only a guide and nothing more, the next manual maybe total different. Check this load out and see what you come up with, see what the manuals say:</strong></p><p><strong>7mm Mag</strong></p><p><strong>160 Speer</strong></p><p><strong>65 gr of H4831</strong></p><p><strong>(this is what I have loaded for over 25 years in my rifle, plus in 3 other 700 models - but it's over max in most of the manuals that I've seen).</strong></p><p><strong></strong></p><p><strong>When I start a new lot of powder, I always start low and work up again. Then when I start seeing the pressure signs again I stop. If I should happen to reach a "max" load of 1.5 grs less than before, well, then that is where I would have to stop, for I am at the "max" pressure for that "lot" of powder, so it won't matter what my velocity is, especially if it is on the low side, because I am at 'max".</strong></p><p></p><p>Happy hunting & keep safe....</p></blockquote><p></p>
[QUOTE="glassman, post: 206426, member: 6503"] 280, Your question: [I]I have to ask how you know your max loads? Are you saying just stopped at a certain point you though safe and called it max, or are you saying you know it's a max pressure or velocity load?[/I] [B]When the bolt starts to get tight, that's the one main indicator. But of course there are other things too. I also use a RCBS Precision Mic to check the headspace.[/B] [I]Do you keep adding powder until you see pressure signs then back off, or what?[/I] [B]That is correct? That's exactly how I've done it for 34 yrs now. I would imagine that is pretty much how most people have done it to, especially if they don't have a chronograph.[/B] [I]do you simply use the "max powder charge" from the book?[/I] [B] I use it only for a guide. The 'max" charge in one manual is only a guide and nothing more, the next manual maybe total different. Check this load out and see what you come up with, see what the manuals say: 7mm Mag 160 Speer 65 gr of H4831 (this is what I have loaded for over 25 years in my rifle, plus in 3 other 700 models - but it's over max in most of the manuals that I've seen). When I start a new lot of powder, I always start low and work up again. Then when I start seeing the pressure signs again I stop. If I should happen to reach a "max" load of 1.5 grs less than before, well, then that is where I would have to stop, for I am at the "max" pressure for that "lot" of powder, so it won't matter what my velocity is, especially if it is on the low side, because I am at 'max".[/B] Happy hunting & keep safe.... [/QUOTE]
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