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2nd test results. Thoughts??

 
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  #1  
Old 11-09-2012, 01:34 PM
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2nd test results. Thoughts??

so, I took Valkyrie out for another load test. I used 46.0 as my max load this time, because I had seen a very slight ejector mark on my brass at that weight last time. I made up 23 rounds at the following powder weights:

44.4gr (loaded 5 to use as sighters)
44.7
45.0
45.2
45.5
45.7
46.0

I shot a sighter target with the 44.4 gr to make sure I was at on POA/POA, I was close enough that I could do my test (less than half an inch difference POA/POI)


my test was a modified OCW test, I did not let the barrel completely cool between every shot

I shot 3 strings, letting the barrel cool between strings. The first and third string were shot in order by increasing powder weight. Because I wanted to make sure that barrel temp wasn't having a major part in my results, I reversed my firing order for the second string. I did not notice any pressure signs on any of my brass.

Outside temp was 32 degrees, I did all my shooting in just about an hour.

Here's my target


the target order goes:

44.7 45.0 45.2
45.5 45.7 46.0

There was one called flier on the 44.7 grouping.

Any thoughts on interpreting my shots?
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Old 11-09-2012, 02:45 PM
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Re: 2nd test results. Thoughts??

I am not seeing any appreciable shift in POI with charges from 45.2 through 45.7. Would you agree?

My understanding of OCW is we're looking for the middle of the range where we get no changes in POI, and then we adjust seating depth to fine tune and go for better grouping from there.

That being said, I guess if it were me; I'd reconfirm at 200 or 300 yds (assuming these were at 100) if results are the same, stick with 45.5 for a while and try seating depth changes next.

Others may interpret this differently.
Will be curious to hear how this works out as it progresses.
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Old 11-09-2012, 02:52 PM
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Re: 2nd test results. Thoughts??

Quote:
Originally Posted by SBruce View Post
I am not seeing any appreciable shift in POI with charges from 45.2 through 45.7. Would you agree?

My understanding of OCW is we're looking for the middle of the range where we get no changes in POI, and then we adjust seating depth to fine tune and go for better grouping from there.
That's what I was thinking also. I let my self get caught up with group size, and 44.5 and 44.7 are bigger groups than 44.2 and 46.0. Looking at it, I think 45.5 will be the OCW, like you said.

I'm pretty new to reloading, having just started last spring, so I'm always on the look out for more advice, and to get other people's opinions
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Old 11-09-2012, 03:21 PM
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Re: 2nd test results. Thoughts??

The 45.0 group. 3 rounds in 2 holes. And those 2 holes are dispersed horizontally. Reload some at 45.0 and at 45.5 then go longer as SBruce says. See what ya get.

Just my thoughts.
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Old 11-09-2012, 03:35 PM
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Re: 2nd test results. Thoughts??

Quote:
Originally Posted by Wile E Coyote View Post
The 45.0 group. 3 rounds in 2 holes. And those 2 holes are dispersed horizontally. Reload some at 45.0 and at 45.5 then go longer as SBruce says. See what ya get.

Just my thoughts.
thanks for the ideas! I hadn't thought about the fact that the 45.0 load had no vertical
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Old 11-09-2012, 07:20 PM
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Re: 2nd test results. Thoughts??

So, I'm looking at trying the 45.0 load, and the 45.5 load again, this coming week, at 200 yards.is there another load I might want to try? Or should I just stick with those two?
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Old 11-09-2012, 08:16 PM
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Re: 2nd test results. Thoughts??

In my simple mind, thinking that tuning loads is to enable more consistent game harvest, I don't see enough difference in any of the groups to make much difference. Assuming the shots were @ at least 100 yards.

200 yard shooting may reveal different results but I would doubt it.

If harvesting game is the goal (not wearing out the barrel squeezing fractions of an inch) I'd go with the highest velocity load. Thinking that wind is the worst enemy and time of flight would be the shortest.

Just my tho'ts.
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