LiveLife
Member
For me, accuracy is everything.
Many reloaders may ponder the aspects of OAL/COL, seating depth, neck tension, chamber pressure build, chrono'd velocities for the lowest SD number, etc. but in my opinion, accuracy on target is the final word on reloading variables that results from consistency.
I used to hold on to the notion that accuracy improved as I worked towards near max powder charge from the supposition that higher chamber pressures translated to more consistent powder burn to produce more consistent muzzle velocities. This has been the case for me with most powders but during the current component shortage, I had a chance to do load development for different powders where I observed accuracy that modulated.
An example would be a work up of powder X from 4.5 gr to 5.5 gr for a specific bullet. Accuracy could be observed with 4.6 gr load but decrease with 4.8 gr load. Then accuracy improve with 5.0 gr load but decrease with 5.2 - 5.4 gr. When I initially experienced this doing various 9mm/40S&W/45ACP load developments, I chalked it up to shooter error/fatigue but when I more or less got similar results on subsequent range trips, I began to wonder.
Could this be the demonstration of accuracy nodes and have you experienced this with your load development? '
And if so, could .2 - .3 gr change powder burn characteristics enough to affect accuracy measurable on the target?
Is this the reason why with some powders, we could get lighter target load near the start charge that are accurate but also get loads that are accurate at higher powder charges?
Many reloaders may ponder the aspects of OAL/COL, seating depth, neck tension, chamber pressure build, chrono'd velocities for the lowest SD number, etc. but in my opinion, accuracy on target is the final word on reloading variables that results from consistency.
I used to hold on to the notion that accuracy improved as I worked towards near max powder charge from the supposition that higher chamber pressures translated to more consistent powder burn to produce more consistent muzzle velocities. This has been the case for me with most powders but during the current component shortage, I had a chance to do load development for different powders where I observed accuracy that modulated.
An example would be a work up of powder X from 4.5 gr to 5.5 gr for a specific bullet. Accuracy could be observed with 4.6 gr load but decrease with 4.8 gr load. Then accuracy improve with 5.0 gr load but decrease with 5.2 - 5.4 gr. When I initially experienced this doing various 9mm/40S&W/45ACP load developments, I chalked it up to shooter error/fatigue but when I more or less got similar results on subsequent range trips, I began to wonder.
Could this be the demonstration of accuracy nodes and have you experienced this with your load development? '
And if so, could .2 - .3 gr change powder burn characteristics enough to affect accuracy measurable on the target?
Is this the reason why with some powders, we could get lighter target load near the start charge that are accurate but also get loads that are accurate at higher powder charges?
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