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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Edge VS 338 Lapua Improved
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<blockquote data-quote="Pdvdh" data-source="post: 1115580" data-attributes="member: 4191"><p>There is no way to account for changing point of impact with a ballistics program. The ballistics program cannot predict how POI might change with differing MVs. </p><p></p><p>I rarely experience a 30-degree F temperature swing from my load development and testing temperature at the time I'm shooting at a large game animal. In fact generally less than 15F at the times I take my shot. I'm almost always shooting in the 40-60F temperature range, and generally in the 45-55F range.</p><p></p><p>Daily high/low temperature swings could exceed 35F, but at the time of the shot while sheep hunting over the past 40 yrs, the temperature has generally been very similar to what I have pre-programmed into my ballistics calculator. </p><p></p><p>I do have a MV versus Temperature calibration curve in my ballistics program for RL33. As you can see, it's nowhere near the 3fps/degree F rate posted earlier in this Thread. Here's what my calibration curve looks like, based on my collection of MVs collected over triplicate chronograph data with RL33:</p><p></p><p><img src="http://i712.photobucket.com/albums/ww125/pdhorwath/RL33%20MV%20vs%20Temp_zpsk1lzwgn3.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1115580, member: 4191"] There is no way to account for changing point of impact with a ballistics program. The ballistics program cannot predict how POI might change with differing MVs. I rarely experience a 30-degree F temperature swing from my load development and testing temperature at the time I'm shooting at a large game animal. In fact generally less than 15F at the times I take my shot. I'm almost always shooting in the 40-60F temperature range, and generally in the 45-55F range. Daily high/low temperature swings could exceed 35F, but at the time of the shot while sheep hunting over the past 40 yrs, the temperature has generally been very similar to what I have pre-programmed into my ballistics calculator. I do have a MV versus Temperature calibration curve in my ballistics program for RL33. As you can see, it's nowhere near the 3fps/degree F rate posted earlier in this Thread. Here's what my calibration curve looks like, based on my collection of MVs collected over triplicate chronograph data with RL33: [IMG]http://i712.photobucket.com/albums/ww125/pdhorwath/RL33%20MV%20vs%20Temp_zpsk1lzwgn3.jpg[/IMG] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Edge VS 338 Lapua Improved
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