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post #1 of 4 (permalink) Old 09-22-2010, 07:44 PM Thread Starter
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.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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post #2 of 4 (permalink) Old 09-22-2010, 08:00 PM
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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.

Remington 710 .270
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post #3 of 4 (permalink) Old 09-22-2010, 08:08 PM
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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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post #4 of 4 (permalink) Old 09-26-2010, 09:45 PM
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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!

Remington 710 .270
Smith And Wesson M&P40
Mossberg 835 Ulti-Mag 12 Ga
CVA optima Mag .50 cal. Muzzleloader
1968 Browning recurve
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