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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Help me plan out a mid range rifle? .25-06 & light barrel experts needed.
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<blockquote data-quote="Bart B" data-source="post: 505808" data-attributes="member: 5302"><p>If the range for that performance is 700 yards, that's what the OP wants but I don't believe that rifle's barrel as stated will do that well at 1000 yards. If the range for those groups is only 100 yards, I'd believe that. But those groups won't be the same MOA at 700; more like twice that size, 1 to 1.5 MOA. Accuracy grows in size as range increases due to the spread of muzzle velocity and bullets' BC as well as subtle cross winds; typically 8 to 15% for each 100 yards past the first 100.</p><p></p><p>If this claim's what you've done once in a while, that's what some factory rifles will do also; once in a while. But they don't do it all the time. Even rifles holding benchrest records have accuracy level all the time 2 to 3 times the size of that record group, sometime more. Rifle accuracy is what one can count on all the time, not just when everything goes perfect. You gotta count all shots fired, otherwise shoot one 30-shot group then claim the smallest 5-shot cluster as its accuracy level. Plus, to have at least 90% confidence that a group represents real accuracy, you gotta shoot at least 20 to 25 shots per group. 5-shot ones are at best only 50% credible.</p></blockquote><p></p>
[QUOTE="Bart B, post: 505808, member: 5302"] If the range for that performance is 700 yards, that's what the OP wants but I don't believe that rifle's barrel as stated will do that well at 1000 yards. If the range for those groups is only 100 yards, I'd believe that. But those groups won't be the same MOA at 700; more like twice that size, 1 to 1.5 MOA. Accuracy grows in size as range increases due to the spread of muzzle velocity and bullets' BC as well as subtle cross winds; typically 8 to 15% for each 100 yards past the first 100. If this claim's what you've done once in a while, that's what some factory rifles will do also; once in a while. But they don't do it all the time. Even rifles holding benchrest records have accuracy level all the time 2 to 3 times the size of that record group, sometime more. Rifle accuracy is what one can count on all the time, not just when everything goes perfect. You gotta count all shots fired, otherwise shoot one 30-shot group then claim the smallest 5-shot cluster as its accuracy level. Plus, to have at least 90% confidence that a group represents real accuracy, you gotta shoot at least 20 to 25 shots per group. 5-shot ones are at best only 50% credible. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Help me plan out a mid range rifle? .25-06 & light barrel experts needed.
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