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Hunting
Long Range Hunting & Shooting
600 yard ladder or 100 yard groups?
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<blockquote data-quote="Greyfox" data-source="post: 1417638" data-attributes="member: 10291"><p>With the last 7 rifle/loads I have worked up with 200 yard ladders and accuracy testing, I have found that the optimized loads gave comparable results when tested at long range(500-1000+ yards). I like to test at 200 yards. IMO, it gives better resolution of the shots compared to 100 Yards. Too much past 200 yards, wind, mirage, etc. may introduce error to the results needed during testing. Compared to years ago, the quality of the components, particularly the top quality bullets with very accurate BC information, optimizing loads is far less complicated. This is from my most recent work done on my 6.5x47 PRS rifle. Initial testing had shown H4350 gave promising results with a bullet seating of the Berger 130gr Hybrid, 015" off the lands. The charge weight of 41.2 grains produced accuracy of 25MOA with SD of 4. When confirmed at 1000 yards, it produced <.5MOA at POI provided by my ballistic program. Interestingly, the entire ladder(1.2gr spread) was within .5MOA at 200 Yards. Velocity change/.1gr was less then 5FPS. The 41.8gr load showed slight pressure signs.</p><p>[ATTACH]93353[/ATTACH] [ATTACH]93354[/ATTACH]</p></blockquote><p></p>
[QUOTE="Greyfox, post: 1417638, member: 10291"] With the last 7 rifle/loads I have worked up with 200 yard ladders and accuracy testing, I have found that the optimized loads gave comparable results when tested at long range(500-1000+ yards). I like to test at 200 yards. IMO, it gives better resolution of the shots compared to 100 Yards. Too much past 200 yards, wind, mirage, etc. may introduce error to the results needed during testing. Compared to years ago, the quality of the components, particularly the top quality bullets with very accurate BC information, optimizing loads is far less complicated. This is from my most recent work done on my 6.5x47 PRS rifle. Initial testing had shown H4350 gave promising results with a bullet seating of the Berger 130gr Hybrid, 015” off the lands. The charge weight of 41.2 grains produced accuracy of 25MOA with SD of 4. When confirmed at 1000 yards, it produced <.5MOA at POI provided by my ballistic program. Interestingly, the entire ladder(1.2gr spread) was within .5MOA at 200 Yards. Velocity change/.1gr was less then 5FPS. The 41.8gr load showed slight pressure signs. [ATTACH]93353[/ATTACH] [ATTACH]93354[/ATTACH] [/QUOTE]
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600 yard ladder or 100 yard groups?
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