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Rifles, Reloading, Optics, Equipment
Reloading
need data and suggestions for 338 lapua
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<blockquote data-quote="jmden" data-source="post: 361807" data-attributes="member: 1742"><p>Do you mean a 250g TSX? ...with a G1 bc of .425, acc'd to Barnes?? Or a 225 TTSX with a Barnes derived G1 bc of .514. Often manufacturer bc numbers are derived at velocites of 3K and so the bc number is only good for that velocity and drops off substanially at lower velocities important to long range hunters due the distances bullets are traveling in a long range hunting sceneario.</p><p> </p><p>G1 bc of the 300 SMK is (averaged) about .745. Potentially, quite a difference to the long range hunter from the Barnes bullets. Litz's experimentally derived data shows a G1 bc of .802 at 3K and above, .769 at 2.5K, .742 at 2K and .665 at 1.5K fps.</p></blockquote><p></p>
[QUOTE="jmden, post: 361807, member: 1742"] Do you mean a 250g TSX? ...with a G1 bc of .425, acc'd to Barnes?? Or a 225 TTSX with a Barnes derived G1 bc of .514. Often manufacturer bc numbers are derived at velocites of 3K and so the bc number is only good for that velocity and drops off substanially at lower velocities important to long range hunters due the distances bullets are traveling in a long range hunting sceneario. G1 bc of the 300 SMK is (averaged) about .745. Potentially, quite a difference to the long range hunter from the Barnes bullets. Litz's experimentally derived data shows a G1 bc of .802 at 3K and above, .769 at 2.5K, .742 at 2K and .665 at 1.5K fps. [/QUOTE]
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Reloading
need data and suggestions for 338 lapua
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