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Rifles, Reloading, Optics, Equipment
Reloading
Powder Charges +/- 1gr the same???
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<blockquote data-quote="BallisticsGuy" data-source="post: 1208257" data-attributes="member: 96226"><p>It's simple, you have to separate group size from velocity. At short to modest ranges like 100yrd zeroing distance group size and velocity need not have a lot to do with each other. Time of flight is tiny and vertical dispersion won't have gotten out of hand. </p><p></p><p>Regarding anything that BR guys do as comparable to anything non-BR guys do is pointless. BR shooting requires tuning things for minimum group size at a specific distance with as many variables as possible removed. The number of tricks and techniques that BR guys use is astonishing given the almost superstitious connection any one of them independently might have to do with getting those amazing group sizes. Just like a wizards spell, you get no results if you don't use the whole spell recipe.</p><p></p><p>My Dad, who taught me to handload, always said that +/-.2grains was more than sufficient for hunting ammo and he ended up correct. Experience has shown that some loads I have made with .5gn tolerances produce single digit SD's and horrid 100m groups while in others I can have .05gn charge variances and get deep double digit SD's and great 100m groups but horrid 1000m groups. Powder charge weight is just one component. Seating depth, neck tension, case fill %, etc... all can make a difference. FWIW, my LR match ammo needs to throw single digit SD's and half inch 100m groups or it just won't be competitive. Competitive is different than usefully accurate.</p></blockquote><p></p>
[QUOTE="BallisticsGuy, post: 1208257, member: 96226"] It's simple, you have to separate group size from velocity. At short to modest ranges like 100yrd zeroing distance group size and velocity need not have a lot to do with each other. Time of flight is tiny and vertical dispersion won't have gotten out of hand. Regarding anything that BR guys do as comparable to anything non-BR guys do is pointless. BR shooting requires tuning things for minimum group size at a specific distance with as many variables as possible removed. The number of tricks and techniques that BR guys use is astonishing given the almost superstitious connection any one of them independently might have to do with getting those amazing group sizes. Just like a wizards spell, you get no results if you don't use the whole spell recipe. My Dad, who taught me to handload, always said that +/-.2grains was more than sufficient for hunting ammo and he ended up correct. Experience has shown that some loads I have made with .5gn tolerances produce single digit SD's and horrid 100m groups while in others I can have .05gn charge variances and get deep double digit SD's and great 100m groups but horrid 1000m groups. Powder charge weight is just one component. Seating depth, neck tension, case fill %, etc... all can make a difference. FWIW, my LR match ammo needs to throw single digit SD's and half inch 100m groups or it just won't be competitive. Competitive is different than usefully accurate. [/QUOTE]
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Reloading
Powder Charges +/- 1gr the same???
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