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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
16.5" 6.5 Creedmoor capabilities
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<blockquote data-quote="CA48" data-source="post: 2504276" data-attributes="member: 21446"><p>You would be better off with 140s out far and 120s for closer ranges if you were going to run multiple loads. </p><p>With 120 eldms at 2600 vs 140 elms at 2500. At 1000 yards the 120 has about 3-4" more wind drift for a 5mph 3cl wind according to AB. In reality from experience with my 18" 6.5 creed when the wind is 5-10mph the 120s will drift 1-1.5 moa or more than the 140 at 750 yards and as the winds get higher this gets exaggerated even more.</p><p> Both loads were shooting a little over half Moa. I was using 120gr SMKs and 140gr Hornady bthp's not a perfect apples to apples comparison but both have relatively low bc's for those calibers and weights compared to what's available. </p><p>Shot both to get an idea for yourself. Although with factory ammo it might be hard to get a true comparison if one ammo shoots 1moa when the other ammo type is shooting 1/2 moa. In general a heavy for caliber bullet with a high bc will have less drift at longer ranges where a bullet is getting near transonic and will retain velocity better at these ranges despite a lighter lower bc bullet that starts out faster from the muzzle.</p></blockquote><p></p>
[QUOTE="CA48, post: 2504276, member: 21446"] You would be better off with 140s out far and 120s for closer ranges if you were going to run multiple loads. With 120 eldms at 2600 vs 140 elms at 2500. At 1000 yards the 120 has about 3-4” more wind drift for a 5mph 3cl wind according to AB. In reality from experience with my 18” 6.5 creed when the wind is 5-10mph the 120s will drift 1-1.5 moa or more than the 140 at 750 yards and as the winds get higher this gets exaggerated even more. Both loads were shooting a little over half Moa. I was using 120gr SMKs and 140gr Hornady bthp’s not a perfect apples to apples comparison but both have relatively low bc’s for those calibers and weights compared to what’s available. Shot both to get an idea for yourself. Although with factory ammo it might be hard to get a true comparison if one ammo shoots 1moa when the other ammo type is shooting 1/2 moa. In general a heavy for caliber bullet with a high bc will have less drift at longer ranges where a bullet is getting near transonic and will retain velocity better at these ranges despite a lighter lower bc bullet that starts out faster from the muzzle. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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16.5" 6.5 Creedmoor capabilities
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