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Copper Bullets?
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<blockquote data-quote="budlight" data-source="post: 1995987" data-attributes="member: 2939"><p>Here is some interesting information! Must be 2000 fps to mushroom The other thing is that I ran the GMX .447 BC through the Hornady Ballistic calculator with 2800 fps starting at the muzzle. I have 24 inch 308's and they aren't a power house for speed I use CFE 223 for powder and chrono testing good groups in my 10:1 twist are right at 2800 fps. So at 1000 feet altitude you go under the magic 2000 fps at just over 400 yards</p><p></p><p>+<a href="https://www.chuckhawks.com/hornady_GMX_bullets.htm" target="_blank">https://www.chuckhawks.com/hornady_GMX_bullets.htm</a></p></blockquote><p></p>
[QUOTE="budlight, post: 1995987, member: 2939"] Here is some interesting information! Must be 2000 fps to mushroom The other thing is that I ran the GMX .447 BC through the Hornady Ballistic calculator with 2800 fps starting at the muzzle. I have 24 inch 308's and they aren't a power house for speed I use CFE 223 for powder and chrono testing good groups in my 10:1 twist are right at 2800 fps. So at 1000 feet altitude you go under the magic 2000 fps at just over 400 yards +[URL]https://www.chuckhawks.com/hornady_GMX_bullets.htm[/URL] [/QUOTE]
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