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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet weight, velocity and BC......trade offs??
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<blockquote data-quote="Dan B" data-source="post: 99687" data-attributes="member: 367"><p>Bart...I'm plugging in a 162gr bullet (.625 BC) at 2700fps and 8500ft of elevation gives 1700+ ft. lbs of energy at 500 yards. A 154gr (.525 BC) at the same velocity will give 1509 ft. lbs. Both loads will also give approx 10MOA of drop at 500yards which will work great against my Burris Ballistic Plex in the 3-12x32 LER scope. I'm not trying to cause a ruckus...just asking to opinions to verify my calculations (and theories) or shorten my effective range.</p><p></p><p>The barrel length will be seventeen inches on an XP-100 that Kirby is going to build. I'm getting 2600fps from a 7mm-08 using 154gr SST's and 16.75" of barrel. I'm hoping that more capacity will get the 154gr IB or 160gr AB to the 2700fps mark.</p></blockquote><p></p>
[QUOTE="Dan B, post: 99687, member: 367"] Bart...I'm plugging in a 162gr bullet (.625 BC) at 2700fps and 8500ft of elevation gives 1700+ ft. lbs of energy at 500 yards. A 154gr (.525 BC) at the same velocity will give 1509 ft. lbs. Both loads will also give approx 10MOA of drop at 500yards which will work great against my Burris Ballistic Plex in the 3-12x32 LER scope. I'm not trying to cause a ruckus...just asking to opinions to verify my calculations (and theories) or shorten my effective range. The barrel length will be seventeen inches on an XP-100 that Kirby is going to build. I'm getting 2600fps from a 7mm-08 using 154gr SST's and 16.75" of barrel. I'm hoping that more capacity will get the 154gr IB or 160gr AB to the 2700fps mark. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet weight, velocity and BC......trade offs??
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