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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Gel Test Data part 2
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<blockquote data-quote="cohunt" data-source="post: 2674977" data-attributes="member: 94491"><p>Sooo.. back to the wind drift part- regardless of mono vs cup and core --here are my thoughts.</p><p></p><p>I'm in the same boat as Steve --- wind drift is an extremely difficult aspect to calculate that os not based solely on BC.</p><p></p><p>BC changes drag- which can reduce some wind effect and also time of flight-- yet a greater velocity also reduces the time of flight. </p><p>Less time in the air-- less time for wind to change the bullets vector.</p><p>BUT a larger/longer bullet would have more surface area for the "side" wind to affect its flight path. BUT a heavier bullet will be less affected by wind than a lighter one (newton's law of motion/inertia)- BUT we also know that gyroscopic stability ( twist rates/rpm's) will affect straight line paths in 2 different aspects-- the higher the spin- the more stable ( think football spin) - BUT the faster the spin the more spin drift at distance. </p><p>Then throwing in the inconsistencies of actual wind speed and direction over distance in the real world ( up drafts and different vectors due to terrain or temp changes) </p><p>You could start throwing in the Coriolis effect for further distances too.</p><p></p><p>ALL of these things will affect a bullets flight path --- and the further the distance is- the longer the time of flight is- the more all these things will change the ultimate poi vs the poa ---- drop can be calculated fairly accurately as long as the data input is accurate--- but the wind drift has so many variables it gets harder to calculate accurately the further the distance/time gets.</p><p></p><p>I like the "real world" testing he is doing -- I would prefer to see bullets on paper vs rocks too so we can get a better idea of any change it might show on an animals vital area ( since we are talking hunting)</p><p></p><p>I read and view the info presented and draw my own conclusions </p><p></p><p>The more people that can participate in "testing side by side comparisons" -- the more conslclusions we can draw. </p><p></p><p>The most difficult part of the testing is the duplication of weather variables in my mind.</p></blockquote><p></p>
[QUOTE="cohunt, post: 2674977, member: 94491"] Sooo.. back to the wind drift part- regardless of mono vs cup and core --here are my thoughts. I'm in the same boat as Steve --- wind drift is an extremely difficult aspect to calculate that os not based solely on BC. BC changes drag- which can reduce some wind effect and also time of flight-- yet a greater velocity also reduces the time of flight. Less time in the air-- less time for wind to change the bullets vector. BUT a larger/longer bullet would have more surface area for the "side" wind to affect its flight path. BUT a heavier bullet will be less affected by wind than a lighter one (newton's law of motion/inertia)- BUT we also know that gyroscopic stability ( twist rates/rpm's) will affect straight line paths in 2 different aspects-- the higher the spin- the more stable ( think football spin) - BUT the faster the spin the more spin drift at distance. Then throwing in the inconsistencies of actual wind speed and direction over distance in the real world ( up drafts and different vectors due to terrain or temp changes) You could start throwing in the Coriolis effect for further distances too. ALL of these things will affect a bullets flight path --- and the further the distance is- the longer the time of flight is- the more all these things will change the ultimate poi vs the poa ---- drop can be calculated fairly accurately as long as the data input is accurate--- but the wind drift has so many variables it gets harder to calculate accurately the further the distance/time gets. I like the "real world" testing he is doing -- I would prefer to see bullets on paper vs rocks too so we can get a better idea of any change it might show on an animals vital area ( since we are talking hunting) I read and view the info presented and draw my own conclusions The more people that can participate in "testing side by side comparisons" -- the more conslclusions we can draw. The most difficult part of the testing is the duplication of weather variables in my mind. [/QUOTE]
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Gel Test Data part 2
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