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Rifles, Reloading, Optics, Equipment
Reloading
Need Help....Heavy Powder Residue On Case...
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<blockquote data-quote="MagnumManiac" data-source="post: 1117423" data-attributes="member: 10755"><p>OK, let's put some of your anxiety to rest.</p><p>Your chamber is NORMAL, the case headspaces off the belt, therefore, your shoulder position plays NO PART in the first firing.</p><p>As long as you only bump your shoulder .002"-.003", everything, including case life, will be fine.</p><p>I will guarantee that your problem will be from seating the bullet so far out of the case neck. Put it in further, say one calibre, and retest. It is NOT necessary for very good accuracy to be close to the rifling, this is a BR belief that has somehow become gospel. Even jumps of .150" or more can be tuned to be just as accurate as .010".</p><p>I believe the little amount of neck tension is causing your bullet to move with the primer ignition, causing poor chamber seal due to lack of normal start pressure. I saw this, and dented case bodies, when working up loads when the 7mmRUM first appeared, errattic ignition is the cause.</p><p></p><p>Cheers.</p><p>lightbulb</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 1117423, member: 10755"] OK, let's put some of your anxiety to rest. Your chamber is NORMAL, the case headspaces off the belt, therefore, your shoulder position plays NO PART in the first firing. As long as you only bump your shoulder .002"-.003", everything, including case life, will be fine. I will guarantee that your problem will be from seating the bullet so far out of the case neck. Put it in further, say one calibre, and retest. It is NOT necessary for very good accuracy to be close to the rifling, this is a BR belief that has somehow become gospel. Even jumps of .150" or more can be tuned to be just as accurate as .010". I believe the little amount of neck tension is causing your bullet to move with the primer ignition, causing poor chamber seal due to lack of normal start pressure. I saw this, and dented case bodies, when working up loads when the 7mmRUM first appeared, errattic ignition is the cause. Cheers. lightbulb [/QUOTE]
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Reloading
Need Help....Heavy Powder Residue On Case...
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