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Rifles, Reloading, Optics, Equipment
Reloading
primer cratering 7mm ultra mag
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<blockquote data-quote="Fiftydriver" data-source="post: 180136" data-attributes="member: 10"><p>If the crater edges are round and there are no other signs of high pressure, increased bolt lift force, Sticky extraction, ejector mark on case head, flattened primer edges, etc.... I would say this is your problem. 75 thou is just to large but its not dangerously large by any means.</p><p> </p><p>Best thing to do is shoot over a chrono to get an idea what velocity your getting.</p><p> </p><p>As mentioned, its certainly possible to correct this but in your case, it may be more surgery then you really want to pay for. Your call however.</p><p> </p><p>Alot of guys will say these cratered primers are from high pressure. If there are no other signs of high pressure, that is generally not the case at all and its an oversized firing pin hole issue more then anything else.</p><p> </p><p>At times, a heavy duty striker spring can reduce this to some degree but it will not solve the problem, just a band aid and at times, it will not make much difference at all except to reduce lock time which is never a bad thing.</p><p> </p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 180136, member: 10"] If the crater edges are round and there are no other signs of high pressure, increased bolt lift force, Sticky extraction, ejector mark on case head, flattened primer edges, etc.... I would say this is your problem. 75 thou is just to large but its not dangerously large by any means. Best thing to do is shoot over a chrono to get an idea what velocity your getting. As mentioned, its certainly possible to correct this but in your case, it may be more surgery then you really want to pay for. Your call however. Alot of guys will say these cratered primers are from high pressure. If there are no other signs of high pressure, that is generally not the case at all and its an oversized firing pin hole issue more then anything else. At times, a heavy duty striker spring can reduce this to some degree but it will not solve the problem, just a band aid and at times, it will not make much difference at all except to reduce lock time which is never a bad thing. Kirby Allen(50) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
primer cratering 7mm ultra mag
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