Ok reloading experts, how did I do with my first adventure into chronography?
I'm just started loading my own match-grade .223 ammo.
My objective is to load the most accurate 100 yd. ammo at the least cost.
My rifle is a Rock River NM-A4. 20" Wylde, stainless barrel w/1-8" twist.
My ammo components are:
69 gr. Sierra Match King BTHP
Alliant Reloder 15
Remington 7 1/2 primers
Winchester brass
I loaded 100 rounds, 10 each of 23.7, 23.9, 24.1...up to 25.5 grs and went to the range.
After setting up my chrony and firing a dozen rounds to be sure the chrony was recording
results and to "warm up" the barrel, here are my results:
Charge Max Min Avg. Spread Standard Deviation
23.7 2609 2501 2544.6 108 36.4
23.9 2635 2554 2595.3 81 26.3
24.1 2656 2588 2629.4 68 21.2
24.3 2699 2640 2666.5 59 19.8
24.5 2715 2650 2681.3 65 23.4
24.7 2777 2688 2718.1 89 24.3
24.9 2777 2715 2738.6 62 23.5
25.1 2789 2732 2763.1 57 20.1
25.3 2818 2754 2777.5 64 19.9
25.5 2867 2789 2811.6 78 21.4
Does the above data look decent? Some reading I've done suggest I should be looking for
a standard deviation in the single-digits - I'm far from single-digits, should I expect that consistency?
It looks like my best load would be at 24.3 grs. with 25.3 a close second.
Should I chrony up some more at 24.2-24.4, and 25.2-25.4, looking for another, sweeter spot?
Is this how it's done?
Should I repeat the entire process to provide additional, hopefully duplicate data?
If I'm on the right track, my next adventure is to repeat the process for a 300yd round using 77 gr. SMKs.
Any suggestions there?
Sorry for the length, and thanks in advance!
I'm just started loading my own match-grade .223 ammo.
My objective is to load the most accurate 100 yd. ammo at the least cost.
My rifle is a Rock River NM-A4. 20" Wylde, stainless barrel w/1-8" twist.
My ammo components are:
69 gr. Sierra Match King BTHP
Alliant Reloder 15
Remington 7 1/2 primers
Winchester brass
I loaded 100 rounds, 10 each of 23.7, 23.9, 24.1...up to 25.5 grs and went to the range.
After setting up my chrony and firing a dozen rounds to be sure the chrony was recording
results and to "warm up" the barrel, here are my results:
Charge Max Min Avg. Spread Standard Deviation
23.7 2609 2501 2544.6 108 36.4
23.9 2635 2554 2595.3 81 26.3
24.1 2656 2588 2629.4 68 21.2
24.3 2699 2640 2666.5 59 19.8
24.5 2715 2650 2681.3 65 23.4
24.7 2777 2688 2718.1 89 24.3
24.9 2777 2715 2738.6 62 23.5
25.1 2789 2732 2763.1 57 20.1
25.3 2818 2754 2777.5 64 19.9
25.5 2867 2789 2811.6 78 21.4
Does the above data look decent? Some reading I've done suggest I should be looking for
a standard deviation in the single-digits - I'm far from single-digits, should I expect that consistency?
It looks like my best load would be at 24.3 grs. with 25.3 a close second.
Should I chrony up some more at 24.2-24.4, and 25.2-25.4, looking for another, sweeter spot?
Is this how it's done?
Should I repeat the entire process to provide additional, hopefully duplicate data?
If I'm on the right track, my next adventure is to repeat the process for a 300yd round using 77 gr. SMKs.
Any suggestions there?
Sorry for the length, and thanks in advance!