KILLITnGRILLIT
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Tech.stuff......bullet weight V`s rifle twistAnyone know much about this dark art as my cranium is near meltdown 
I`ve sen the greenhill method but it seems too simplistic ...........Soooo any takers ??
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dpack
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lost river ballistic
seems to have a good article (in support of their rounds)but covering stuff like spin,speed and terminal effects
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KILLITnGRILLIT
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I wouldn`t ,and probably couldn`t afford, the alloy/copper ammo.
I should have stated I am working up handloads and then when talking to a friend we got onto weight/calibre and it descended into hades as we discovered(Cheers Mr.GOOGLE !) that there are other things,such as curve of the ogive etc.
After that we both had frazzled crania(?) so I had posted to see if someone can shed light on it in simple words and pictures 
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dpack
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maybe finding an expert to match gun /n / round /n/ target is the way forward
[b becoming an expert on etc [/b
build a practice round for 100m ,use one of those ones fof a freezer shot
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KILLITnGRILLIT
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I`m fine @ 100-200yds but need to get it right for 300-600yds as there is a world of difference.
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