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GUN MYTHS : HEAVY BULLETS BUCK WIND BETTER
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Reply
Recommend  Message 1 of 9 in Discussion 
From: MSN NicknameGunrockets  (Original Message)Sent: 13/09/2003 11:12
Well here we go again. I just love to tear into old gun myths.
Myth: Heavy bullets buck the wind better.
 
Truth: Nope, heavy bullets are moved further by the wind because most heavy bullets also travel slow. This give the wind more time to act on the bullet and push it off course. That is the same reason heavy bullets have less range than light bullets. The time in flight allows gravity to act on the bullet for a longer period of time and pull it down to the ground. A light fast bullet will hit the ground in the same time frame but will travel further because of it's speed. For instance, if gravity will push a bullet to the ground in 100 nanoseconds (a ficticious time) then a bullet that is traveling at 1500 fps will only have 100 nanoseconds to get from point A to the place that gravity will drop it. A faster bullet such as a 22-250 at 3000 fps will go twice as far as the big heavy bullet before it hits the ground. (Ergo more range for the light fast bullet.) Back to the wind problem. A slow bullet will take let's say 75 nanoseconds to hit the deer. A fast bullet will take only 25 nanoseconds to hit the deer. Therefore the wind will only act on it for 1/3 the time that it will be pushing the big bullet sideways.
You get it?
Sarge


First  Previous  2-9 of 9  Next  Last 
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Recommend  Message 2 of 9 in Discussion 
From: MSN NicknameVelocity762Sent: 23/09/2003 02:15
Doesn't the inertia of the heavery round play a part in bucking the wind better?

Reply
Recommend  Message 3 of 9 in Discussion 
From: MSN NicknameScumbag187Sent: 25/05/2004 17:58
Actually, this isn't QUITE true. The heavier bullet wil GENERALLY have greater inertia than the lighter. The other factor is ballistic co-efficiency.

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The number of members that recommended this message. 0 recommendations  Message 4 of 9 in Discussion 
Sent: 07/06/2004 00:34
This message has been deleted by the author.

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Recommend  Message 5 of 9 in Discussion 
From: AR10ERSent: 07/06/2004 00:36
I agree with scumbag. That just don't sound right.

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Recommend  Message 6 of 9 in Discussion 
From: MSN NicknameDannieTKSent: 07/06/2004 22:18
When did the subject change from heavy vs. light to slow vs. fast?  For a given caliber, ogive shape and muzzle velocity, the heavier bullet will be less affected, primarily because it will slow less than the lighter and shorter bullet.  It will also have a slightly higher cross-sectional density (I made that name up because I've never seen the term defined, mass per unit of longitudinal area) as well as sectional density.
 
The heavier bullet will slow less and be less susceptible to cross-winds if started at the same velocity.

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Recommend  Message 7 of 9 in Discussion 
From: MSN Nicknamecompshooter223Sent: 04/09/2004 06:31
Anyone who ever watched the vapor trail of a bullet going down range through a spotting scope can tell you the difference in wind bucking ability between a 200gr .30 cal and an 80gr .223.

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Recommend  Message 8 of 9 in Discussion 
From: hlslvySent: 28/12/2004 05:09
You better spend some range time, check with any long range shooter or run the numbers in any decent ballistics program.

Heavier bullets of similar shape have a higher BC. This means they slow down at a lower rate (reduced delay time). Since wind sensitivity is almost totally related to delay time, heavier bullets (of similar shape) are less wind sensitive.

Of course, if you are comparing a light spitzer to a heavy round nose, all bets are off; like comparing a basketball to a football.

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Recommend  Message 9 of 9 in Discussion 
From: hlslvySent: 28/12/2004 05:11
For Dannytk:

The term sectional density is actually a short form of cross-sectional density; it was shortende decades ago by gun writers and now nobody uses the full term.

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