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Old 09-22-2010, 08:44 PM
D*N*R* D*N*R* is offline
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Default .270 wind drift

looking at winchester ballistic chart(on line) i was suprised to see a .270 win. bucks the wind better than heavier 30.06 & .308. Dont heavier bullets blow less? Maybe because its getting there faster?
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Old 09-22-2010, 09:00 PM
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extremehunter007 extremehunter007 is offline
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well, the reason why is because 1. it IS faster, 2. it is a much flatter shooting bullet. I shoot 135 gr. Sierra HPBT match long range (out to 863 yards is the farthest so far), and my buddy shooting a remington 700 BDL custom chambered in .308 has almost 9 inches more drift than i do. its all about the Ballistic Coefficient and load build up... powder, primer, casing, overall length/weight. when shooting that far, EVERYTHING makes a diff.
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Old 09-22-2010, 09:08 PM
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WisconsinDeer WisconsinDeer is offline
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The wind drift depends a lot on the ballistic coefficient of the bullet that is being used. A light, flat based bullet will have a low B.C. while a heavier, boat-tail bullet will have a high B.C. Velocity and sectional density also come into play. A .270 wont always buck the wind better than a 30-06 or .308.
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Old 09-26-2010, 10:45 PM
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extremehunter007 extremehunter007 is offline
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Quote:
Originally Posted by WisconsinDeer View Post
The wind drift depends a lot on the ballistic coefficient of the bullet that is being used. A light, flat based bullet will have a low B.C. while a heavier, boat-tail bullet will have a high B.C. Velocity and sectional density also come into play. A .270 wont always buck the wind better than a 30-06 or .308.

as we said, ALL factors come into play. B.C, S.D, powder, primers, bullet wieght, wall concentricity, etc. i shoot the 135 gr. Sierra HPBT match for my long range (800+). however, this year i got into the new SST from hornady, and my groupings at just over 800 yards, are slightly larger than my Match rounds. those things are AMAZING!
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