Is this rifle 1/4MOA, 1/3MOA, 2/3 MOA or 1MOA?
Shot this ladder test indoor (O Celsius)/ outdoor (-10 Celsius) with a lot of mirage off an improvised rest as I had forgotten my bi-pod and rear bag. All 21 shots shot as fast as I could record them on the Chrony starting at 20.0 grains and working up to 20.6 grains of powder.
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Before someone cries fowl as the above were only 3 shot groups here is my ladder test with H 4198. Although the 20.3 grain load had one flier this is the load that is the most stable, low ES and SD, and will shoot well in most rifles. I did include the flier in my aggregate groupings. The 20.6 grain load was awesome in my rifle.
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For those of you that think ladder tests with 3 shot groups at 100 yards are not effective take a look at the top right hand group in the following group of targets. Then look at the next group of targets.
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The right/center shot group on the next group of targets was shot at 300 yards, in slight gusty cross wind, with the same load as above.
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The first year I had this rifle I worked up loads using ladder tests in groups of 3 to 5 ladders (mostly 3) using 5 shots per case/bullet/powder combination. Groups were shot in varying conditions at ranges from 50 yards (barrel break in) to 100 yards and a few at 300 yards. I started with a 1-12 twist, lightweight, barrel and switched to a light varmint, 1-11 twist, mid summer. I tallied up the results that winter and found that I had 151 targets (groups) with a total of approximately 778 rounds. The largest group (1 flier) was 1.3 " with 9 just over 1", including 24 fliers, and the aggregate average for the 151 targets was 0.68".
I have since tested a number of loads and shot numerous targets with the best loads. I have about 200 targets and think that if I tallied them all up my group aggregate average would still be 0.68 or about 2/3MOA. Here are the best loads that I selected from that first summer. I have over 30 more loads that shoot under 0.6" with two different rifles.
[/IMG]
Shot this ladder test indoor (O Celsius)/ outdoor (-10 Celsius) with a lot of mirage off an improvised rest as I had forgotten my bi-pod and rear bag. All 21 shots shot as fast as I could record them on the Chrony starting at 20.0 grains and working up to 20.6 grains of powder.
Before someone cries fowl as the above were only 3 shot groups here is my ladder test with H 4198. Although the 20.3 grain load had one flier this is the load that is the most stable, low ES and SD, and will shoot well in most rifles. I did include the flier in my aggregate groupings. The 20.6 grain load was awesome in my rifle.
For those of you that think ladder tests with 3 shot groups at 100 yards are not effective take a look at the top right hand group in the following group of targets. Then look at the next group of targets.
The right/center shot group on the next group of targets was shot at 300 yards, in slight gusty cross wind, with the same load as above.
The first year I had this rifle I worked up loads using ladder tests in groups of 3 to 5 ladders (mostly 3) using 5 shots per case/bullet/powder combination. Groups were shot in varying conditions at ranges from 50 yards (barrel break in) to 100 yards and a few at 300 yards. I started with a 1-12 twist, lightweight, barrel and switched to a light varmint, 1-11 twist, mid summer. I tallied up the results that winter and found that I had 151 targets (groups) with a total of approximately 778 rounds. The largest group (1 flier) was 1.3 " with 9 just over 1", including 24 fliers, and the aggregate average for the 151 targets was 0.68".
I have since tested a number of loads and shot numerous targets with the best loads. I have about 200 targets and think that if I tallied them all up my group aggregate average would still be 0.68 or about 2/3MOA. Here are the best loads that I selected from that first summer. I have over 30 more loads that shoot under 0.6" with two different rifles.
