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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Hammer ballistic coefficient tests...
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<blockquote data-quote="WiscGunner" data-source="post: 2614632" data-attributes="member: 97288"><p>Nothing personal but this type of response is why some people don't trust users with the freedom of knowing the BC before purchasing.</p><p></p><p>Please, if this is old info for you, ignore it. BC does 1 thing for us, cut through the air. This shows as 2 results in our testing, velocity loss and wind resistance…all other things being constant.</p><p></p><p>The benefit of Hammer's bands is increased velocity from reduced bearing surface and more consistent BC from gun to gun due to engraving pressure having somewhere to move metal.</p><p></p><p>In your post, you don't mention a measurement of wind deflection at 500yrds, just "not hardly any". Higher BC allows a bullet to cut through the air, including the wind, with less resistance than lower BC. This resistance includes wind deflection the same as crossing a river. A lower Bc bullet like the 124HH will have far more wind deflection than say a 153 A-tip…all other things being equal. High BC retains more velocity down range.</p><p></p><p>Jacking the velocity of the 124 over the 153 simply shortens the time of flight thus the amount of time the wind has to deflect the bullet trajectory…acting like the bullets "bucks more wind". 3000fps to 1000yrds (3000ft) should be 1second of flight time. 3300fps is like shooting 900yrds of wind affected distance to 1000yrds. Compared to a 2700fps bullet that is almost like your target being 200yrds closer than the slow guy regarding wind deflection. Cut that in half to 500yrds and the wind doesn't have much time to affect the bullet path. BC doesnt really START to play into trajectory until about 500yrds and beyond. In short, the higher velocity achieved with Hammer bullets helps to offset the lower BC at medium ranges…until that lower BC deteriorates the velocity below the point of gains.</p></blockquote><p></p>
[QUOTE="WiscGunner, post: 2614632, member: 97288"] Nothing personal but this type of response is why some people don’t trust users with the freedom of knowing the BC before purchasing. Please, if this is old info for you, ignore it. BC does 1 thing for us, cut through the air. This shows as 2 results in our testing, velocity loss and wind resistance…all other things being constant. The benefit of Hammer's bands is increased velocity from reduced bearing surface and more consistent BC from gun to gun due to engraving pressure having somewhere to move metal. In your post, you don’t mention a measurement of wind deflection at 500yrds, just “not hardly any”. Higher BC allows a bullet to cut through the air, including the wind, with less resistance than lower BC. This resistance includes wind deflection the same as crossing a river. A lower Bc bullet like the 124HH will have far more wind deflection than say a 153 A-tip…all other things being equal. High BC retains more velocity down range. Jacking the velocity of the 124 over the 153 simply shortens the time of flight thus the amount of time the wind has to deflect the bullet trajectory…acting like the bullets “bucks more wind”. 3000fps to 1000yrds (3000ft) should be 1second of flight time. 3300fps is like shooting 900yrds of wind affected distance to 1000yrds. Compared to a 2700fps bullet that is almost like your target being 200yrds closer than the slow guy regarding wind deflection. Cut that in half to 500yrds and the wind doesn’t have much time to affect the bullet path. BC doesnt really START to play into trajectory until about 500yrds and beyond. In short, the higher velocity achieved with Hammer bullets helps to offset the lower BC at medium ranges…until that lower BC deteriorates the velocity below the point of gains. [/QUOTE]
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Hammer ballistic coefficient tests...
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