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<blockquote data-quote="J E Custom" data-source="post: 1220100" data-attributes="member: 2736"><p>Like many of the long range guys, I have done lots of concentricity test on both factory loads and hand loads. My results were not surprising, the factory loads were all over the place. different methods of hand loading produced different results also, so I started trying to refine my process and depending on the case prep, die adjustment, die type and my consistency I found a range of from.000 run out to .007(The worst with an occasional .008 when I was not carful).</p><p></p><p>After shooting ammo with up to .006 TIR if found that ammo loaded with less than .002 run out</p><p>performed the best, .002 to .004 was OK, and anything more than ,004 was a waste of time.</p><p>I also tested the rounds I straightened and found that the ones straightened to around .002 were not as good as the ones loaded to .002 run out, (I guess straightening takes something out of the neck grip and effects the accuracy)</p><p></p><p>The ones that I was able to get to within .0005 shot well but again not as well as the ones loaded to this concentricity.</p><p></p><p>So I worked on my process to try and keep all of my loads in the .000 to .002 thousandths range</p><p>for best accuracy. I have proven to Myself that ammo loaded to .000 run out is the best, (No big surprise). so if I am trying to find out what a rifles potential is I sort nothing but the perfect rounds for this test. (It still doesn't help Me if I don't do my part, but it helps when I do).</p><p></p><p>Just my findings and opinion</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1220100, member: 2736"] Like many of the long range guys, I have done lots of concentricity test on both factory loads and hand loads. My results were not surprising, the factory loads were all over the place. different methods of hand loading produced different results also, so I started trying to refine my process and depending on the case prep, die adjustment, die type and my consistency I found a range of from.000 run out to .007(The worst with an occasional .008 when I was not carful). After shooting ammo with up to .006 TIR if found that ammo loaded with less than .002 run out performed the best, .002 to .004 was OK, and anything more than ,004 was a waste of time. I also tested the rounds I straightened and found that the ones straightened to around .002 were not as good as the ones loaded to .002 run out, (I guess straightening takes something out of the neck grip and effects the accuracy) The ones that I was able to get to within .0005 shot well but again not as well as the ones loaded to this concentricity. So I worked on my process to try and keep all of my loads in the .000 to .002 thousandths range for best accuracy. I have proven to Myself that ammo loaded to .000 run out is the best, (No big surprise). so if I am trying to find out what a rifles potential is I sort nothing but the perfect rounds for this test. (It still doesn't help Me if I don't do my part, but it helps when I do). Just my findings and opinion J E CUSTOM [/QUOTE]
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