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Interpeting Magnetospeed Data
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<blockquote data-quote="Bishop" data-source="post: 929948" data-attributes="member: 26163"><p>Worked a bit more on the load this weekend, ended up with these results. All testing done at 100 yards WITH the magnetospeed hanging offa my barrel, even for the groupings. These are CTC groups </p><p></p><p></p><p>Dropped my powder charge down to 43.5g imr-4064, used same seating depth etc, virgin lapua brass, WLR primers. I shot two 3 shot groups and one 4 shot group with each load. The 4 shot group had 1 flyer every stinkin time for cripes sake.</p><p></p><p>2786 avg fps ES-34 SD-11 for 10 shots Best 3 shot group .190 worst .526 1-flyer out by its lonesome</p><p></p><p>Load number 2 was 43g imr-4064, everything else just like previous.</p><p></p><p>2772 avg fps ES-33 SD- 9 for 10 shots Best 3 shot group .132 worst .702, again 1-flyer way out by its self.</p><p></p><p>Load number 3 was 42.5 imr-4064, everything else like previous</p><p></p><p>2743 avg fps ES- 18 SD-7 for 10 shots Best 3 shot group .255 worst .572, again a flyer out all by its self. Im beginning to see a pattern here.</p><p></p><p>I am thinking the group sizes are mostly due to my lack of consistency shooting from a bipod. </p><p></p><p>I think my next step will be to take load number 2,3, and a load at 42 grains even, and group them at 4 or 500 yards and see if i can see an actual difference. Because the group sizes of all of these loads fall well within the skill level of the shooter. I doubt I can actually Hold .5 moa consistently without screwing something up. </p><p></p><p>Why do the loads number 1, and 2 at 43.5g and 43g only exhibit a 10 fps difference avg for a half grain charge size? Is that some form of pattern or some sort of "node" that I should use as a reference point? Then the load number 3 at 42.5g loses 30 fps avg to the 43g load. Are the velocity numbers between 43g, and 43.5g indicating something I should pay attention to? 10 Fps for a whole half grain looks mighty nice to me! Should i just actually fine tune the load between 43.5 and 43?</p><p></p><p>Also, the flyer in every group was to the right every time. I am a right handed shooter, am i torqing the rifle possibly on some shots? Is this common for a right hander to throw shots to the right? And it was always on the last group i shot, the 4 shot grouping.</p></blockquote><p></p>
[QUOTE="Bishop, post: 929948, member: 26163"] Worked a bit more on the load this weekend, ended up with these results. All testing done at 100 yards WITH the magnetospeed hanging offa my barrel, even for the groupings. These are CTC groups Dropped my powder charge down to 43.5g imr-4064, used same seating depth etc, virgin lapua brass, WLR primers. I shot two 3 shot groups and one 4 shot group with each load. The 4 shot group had 1 flyer every stinkin time for cripes sake. 2786 avg fps ES-34 SD-11 for 10 shots Best 3 shot group .190 worst .526 1-flyer out by its lonesome Load number 2 was 43g imr-4064, everything else just like previous. 2772 avg fps ES-33 SD- 9 for 10 shots Best 3 shot group .132 worst .702, again 1-flyer way out by its self. Load number 3 was 42.5 imr-4064, everything else like previous 2743 avg fps ES- 18 SD-7 for 10 shots Best 3 shot group .255 worst .572, again a flyer out all by its self. Im beginning to see a pattern here. I am thinking the group sizes are mostly due to my lack of consistency shooting from a bipod. I think my next step will be to take load number 2,3, and a load at 42 grains even, and group them at 4 or 500 yards and see if i can see an actual difference. Because the group sizes of all of these loads fall well within the skill level of the shooter. I doubt I can actually Hold .5 moa consistently without screwing something up. Why do the loads number 1, and 2 at 43.5g and 43g only exhibit a 10 fps difference avg for a half grain charge size? Is that some form of pattern or some sort of "node" that I should use as a reference point? Then the load number 3 at 42.5g loses 30 fps avg to the 43g load. Are the velocity numbers between 43g, and 43.5g indicating something I should pay attention to? 10 Fps for a whole half grain looks mighty nice to me! Should i just actually fine tune the load between 43.5 and 43? Also, the flyer in every group was to the right every time. I am a right handed shooter, am i torqing the rifle possibly on some shots? Is this common for a right hander to throw shots to the right? And it was always on the last group i shot, the 4 shot grouping. [/QUOTE]
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