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Rifles, Reloading, Optics, Equipment
Reloading
Ugly extreme spread........now what ?
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<blockquote data-quote="sea2summit" data-source="post: 1672291" data-attributes="member: 105720"><p>Well I'm not a pro but excel tells me your SD for 10 shots is 22.6 and it looks like this. Average 2807.4</p><p>[ATTACH=full]141194[/ATTACH]</p><p></p><p>Your first five rounds had an SD of only 6.2! Average 2797.4fps.</p><p>[ATTACH=full]141195[/ATTACH]</p><p></p><p>Your last 5 have an SD of 27.8! Average 2817.4</p><p>[ATTACH=full]141196[/ATTACH]</p><p></p><p>Maybe it didn't "feel" warm but what's going on inside the barrel may not have caught up, or your clean barrel may have needed to fill some gaps. I don't really like SDs as a measure of accuracy I like proof at range and if I see an unacceptable vertical spread I'll look closer at things like SD and extreme spread of MV.</p><p></p><p>Either way, I'd try for more consistency in the test before I started chasing the load around too much but I'm lazy<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool :cool:" loading="lazy" data-shortname=":cool:" /></p></blockquote><p></p>
[QUOTE="sea2summit, post: 1672291, member: 105720"] Well I’m not a pro but excel tells me your SD for 10 shots is 22.6 and it looks like this. Average 2807.4 [ATTACH=full]141194[/ATTACH] Your first five rounds had an SD of only 6.2! Average 2797.4fps. [ATTACH=full]141195[/ATTACH] Your last 5 have an SD of 27.8! Average 2817.4 [ATTACH=full]141196[/ATTACH] Maybe it didn’t “feel” warm but what’s going on inside the barrel may not have caught up, or your clean barrel may have needed to fill some gaps. I don’t really like SDs as a measure of accuracy I like proof at range and if I see an unacceptable vertical spread I’ll look closer at things like SD and extreme spread of MV. Either way, I’d try for more consistency in the test before I started chasing the load around too much but I’m lazy:cool: [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Ugly extreme spread........now what ?
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