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Rifles, Reloading, Optics, Equipment
Reloading
pressure signs?
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<blockquote data-quote="Kennibear" data-source="post: 1036190" data-attributes="member: 51650"><p>I have used the Sierra 180gr GK in no less than 5 different rifles. You are leaving velocity on the table with 4064 without any benefit of say better accuracy. 4064 has delivered truly great accuracy with flat base 150's but never anything remarkable with 180's. I always go back to 56.5 grains of IMR 4350 with 180 SGK's. You should see at least 2700fps. This is a lot of 4350 but has proven safe in every 30-06 tried. My M98 will take 57gr of IMR 4350 with a Fed 215 LRM. With its extra long 27" barrel this load clocks a touch over 2900fps. It is a very heavy load and not safe in other rifles.</p><p> Your pics of the primer show what I believe is a warm but not hot load. However looking next to your thumb I see the case swelled to fill a large chamber and if your gun has a generous chamber you will not develop the pressure a SAAMI test chamber will. Ditto an extra long throat.</p><p> Concerning ladder testing; it is like chicken soup - it couldn't hurt.</p><p> I do my pressure testing one shot at a time at the range with a box of sized and primed cases and a powder scale. Weigh a charge and drop it into the case and seat a bullet with a old Lyman portable hand press (NOT a 310). One shot at a time and use less powder and few bullets. I usually get my data in less than ten shots. The best accuracy tests start 1 grain less than the simple max test.</p><p></p><p>KB</p></blockquote><p></p>
[QUOTE="Kennibear, post: 1036190, member: 51650"] I have used the Sierra 180gr GK in no less than 5 different rifles. You are leaving velocity on the table with 4064 without any benefit of say better accuracy. 4064 has delivered truly great accuracy with flat base 150's but never anything remarkable with 180's. I always go back to 56.5 grains of IMR 4350 with 180 SGK's. You should see at least 2700fps. This is a lot of 4350 but has proven safe in every 30-06 tried. My M98 will take 57gr of IMR 4350 with a Fed 215 LRM. With its extra long 27" barrel this load clocks a touch over 2900fps. It is a very heavy load and not safe in other rifles. Your pics of the primer show what I believe is a warm but not hot load. However looking next to your thumb I see the case swelled to fill a large chamber and if your gun has a generous chamber you will not develop the pressure a SAAMI test chamber will. Ditto an extra long throat. Concerning ladder testing; it is like chicken soup - it couldn't hurt. I do my pressure testing one shot at a time at the range with a box of sized and primed cases and a powder scale. Weigh a charge and drop it into the case and seat a bullet with a old Lyman portable hand press (NOT a 310). One shot at a time and use less powder and few bullets. I usually get my data in less than ten shots. The best accuracy tests start 1 grain less than the simple max test. KB [/QUOTE]
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pressure signs?
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