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Rifles, Reloading, Optics, Equipment
Reloading
Finding maximum load in YOUR rifle
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<blockquote data-quote="nksmfamjp" data-source="post: 2702116" data-attributes="member: 1951"><p> <ol> <li data-xf-list-type="ol">Establish a max pressure based on brass quality and action strength….there should be a rating for both…action - max bolt thrust; case - max pressure of parent, siblings, etc. All based on SAAMI ratings for cartridges in the action and case.</li> <li data-xf-list-type="ol">Use Quickload to help find ~5 powders that give good velocity; >95% burn; 90-103% case fill at max. Pick one….best balance, availability. When these parameters cannot be met, just keep going down the list looking for available and good enough.</li> <li data-xf-list-type="ol">Determine charge for that pressure in Quickload…best possible untuned max load.</li> <li data-xf-list-type="ol">Size your cases to the correct size bolt close -0.002" std size.</li> <li data-xf-list-type="ol">Start there. Load that as max and -25% as MIN. Load 10 pressure increments. Use a good scale. Variation is both dangerous and ruins the quality of results.</li> <li data-xf-list-type="ol">Shoot from MIN to MAX. At first bolt lift, ejector mark, solid click(clicks hard to feel consistently), blown primer, flat primer, etc. STOP!</li> <li data-xf-list-type="ol">Reduce 1-2 increments. I usually reduce 2 increments. This charge weight is over pressure. I want to be under MAX.</li> </ol><p>This works for cartridges with and without data. Helps you get around anomalies in data related to weak guns, odd history, etc.</p></blockquote><p></p>
[QUOTE="nksmfamjp, post: 2702116, member: 1951"] [LIST=1] [*]Establish a max pressure based on brass quality and action strength….there should be a rating for both…action - max bolt thrust; case - max pressure of parent, siblings, etc. All based on SAAMI ratings for cartridges in the action and case. [*]Use Quickload to help find ~5 powders that give good velocity; >95% burn; 90-103% case fill at max. Pick one….best balance, availability. When these parameters cannot be met, just keep going down the list looking for available and good enough. [*]Determine charge for that pressure in Quickload…best possible untuned max load. [*]Size your cases to the correct size bolt close -0.002" std size. [*]Start there. Load that as max and -25% as MIN. Load 10 pressure increments. Use a good scale. Variation is both dangerous and ruins the quality of results. [*]Shoot from MIN to MAX. At first bolt lift, ejector mark, solid click(clicks hard to feel consistently), blown primer, flat primer, etc. STOP! [*]Reduce 1-2 increments. I usually reduce 2 increments. This charge weight is over pressure. I want to be under MAX. [/LIST] This works for cartridges with and without data. Helps you get around anomalies in data related to weak guns, odd history, etc. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Finding maximum load in YOUR rifle
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