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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
A Baffling Buffet of Bullets
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<blockquote data-quote="akmtnhnt" data-source="post: 3024276" data-attributes="member: 120824"><p>And you won't ever be able to figure out where it falls below 2000 if you don't shoot and chrono it. Shooting to 400 yards requires you to not just take box numbers and hope they're right.</p><p></p><p>That said, for planning purposes, Hornady claims 2910fps from a 24 in barrel for their 139gr CX in 7-08. That bullet has a .429 G1 BC. Knock 30fps per inch off and then another 50 or so since it's a tikka. So you're probably around 2800fps. Stick that in a ballistic calc and 2000fps is right at 400 yards. So now, it's worth buying a box and putting the chrono on it and seeing what it actually does. Then shooting it out further and truing the BC.</p></blockquote><p></p>
[QUOTE="akmtnhnt, post: 3024276, member: 120824"] And you won't ever be able to figure out where it falls below 2000 if you don't shoot and chrono it. Shooting to 400 yards requires you to not just take box numbers and hope they're right. That said, for planning purposes, Hornady claims 2910fps from a 24 in barrel for their 139gr CX in 7-08. That bullet has a .429 G1 BC. Knock 30fps per inch off and then another 50 or so since it's a tikka. So you're probably around 2800fps. Stick that in a ballistic calc and 2000fps is right at 400 yards. So now, it's worth buying a box and putting the chrono on it and seeing what it actually does. Then shooting it out further and truing the BC. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
A Baffling Buffet of Bullets
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