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Rifles, Reloading, Optics, Equipment
Reloading
Your Load Development Method ⚖️
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<blockquote data-quote="Hawk in WY" data-source="post: 2655902" data-attributes="member: 70947"><p>I spend time with manuals, measuring case capacity, and measuring distance to the lands (minus .02) before I load a round.</p><p></p><p>With a new barrel I shoot 50 rounds of any load that uses whatever low cost bullets I might have loaded well below max. Load development with a new barrel and virgin brass has not worked for me.</p><p></p><p>I then run that raw data through QuickLOAD and compare results to several manuals. If QuickLOAD calls for 50 grains for Optimal Barrel Time and published data shows max load above 50, I load three rounds; one at 50 grains and three more each at 0.3 grains and .06 grains above and below 50. I run those over a chronograph, take a brief look to see what groups look like and use that velocity data to fine tune QuickLOAD. Several times I have been able to stop here.</p><p></p><p>I then calibrate QuickLOAD with the new velocity and recalculate the OBT load and load five rounds at that load plus another five 0.3 and 0,6 above and below the recalculated OBT load.</p><p></p><p>Those 40 rounds almost always produce my optimal load which I then verify out to 500.</p><p></p><p>I have occasionally tested varying jump or crimp or carefully worked up to the next higher OBT load but it has rarely been necessary.</p><p></p><p>I know enough about statistical process control to not believe in velocity flat spots determined from data from one round at each charge weight.</p><p></p><p>I have observed that my optimal load is very often a load with very low standard deviation.</p></blockquote><p></p>
[QUOTE="Hawk in WY, post: 2655902, member: 70947"] I spend time with manuals, measuring case capacity, and measuring distance to the lands (minus .02) before I load a round. With a new barrel I shoot 50 rounds of any load that uses whatever low cost bullets I might have loaded well below max. Load development with a new barrel and virgin brass has not worked for me. I then run that raw data through QuickLOAD and compare results to several manuals. If QuickLOAD calls for 50 grains for Optimal Barrel Time and published data shows max load above 50, I load three rounds; one at 50 grains and three more each at 0.3 grains and .06 grains above and below 50. I run those over a chronograph, take a brief look to see what groups look like and use that velocity data to fine tune QuickLOAD. Several times I have been able to stop here. I then calibrate QuickLOAD with the new velocity and recalculate the OBT load and load five rounds at that load plus another five 0.3 and 0,6 above and below the recalculated OBT load. Those 40 rounds almost always produce my optimal load which I then verify out to 500. I have occasionally tested varying jump or crimp or carefully worked up to the next higher OBT load but it has rarely been necessary. I know enough about statistical process control to not believe in velocity flat spots determined from data from one round at each charge weight. I have observed that my optimal load is very often a load with very low standard deviation. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Your Load Development Method ⚖️
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