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Hunting
Long Range Hunting & Shooting
Any thoughts,400 yards?
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<blockquote data-quote="J E Custom" data-source="post: 257504" data-attributes="member: 2736"><p>This is not ment to be argumentative so don't take it that way .</p><p></p><p>It is a good subject to debate and we can allways learn something from others if we listen.</p><p></p><p>You are dead on about the wind drift under your conditions BUT your numbers are not apples</p><p>to apples. </p><p></p><p>Most ,277 dia. 150 gr bullets are from.450 to .530 BC.</p><p></p><p>A 300gr .338 bullet will be in the mid to high .700 BC ( 300 SMK is .768 BC).</p><p></p><p>So with a 150gr .277 dia bullet @ 3000 ft/sec drop at 400yrds would be 18.7 "</p><p> Wind drift @ 400 yrds would be 10.2"</p><p></p><p>And with a 300gr .338 dia. bullet @ 3000 ft/sec drop at 400yrds is 16.9"</p><p> and wind drift is 6.4"</p><p></p><p>At 1000yrds the .277 150 gr @3000 ft/sec mv drops 275.7" and drift is 79.7"</p><p> The .338 300 gr @ 3000 ft/sec mv drops.217.0" and drift is 45.4"</p><p></p><p>So compairing the two is not very fair to the 270 .</p><p></p><p>The point to my reply is that with weight comes BC and ( the higher the weigh in</p><p>a given dia. the BC will go up as long as it is the same basic shape ( Not spitzer to</p><p>Round nose ).</p><p></p><p>This is The reason that most long range shooters try to get the Highest BC and velocity</p><p>there rifle is capable of and weight is the key to higher BC's</p><p></p><p>Just my point of view</p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 257504, member: 2736"] This is not ment to be argumentative so don't take it that way . It is a good subject to debate and we can allways learn something from others if we listen. You are dead on about the wind drift under your conditions BUT your numbers are not apples to apples. Most ,277 dia. 150 gr bullets are from.450 to .530 BC. A 300gr .338 bullet will be in the mid to high .700 BC ( 300 SMK is .768 BC). So with a 150gr .277 dia bullet @ 3000 ft/sec drop at 400yrds would be 18.7 " Wind drift @ 400 yrds would be 10.2" And with a 300gr .338 dia. bullet @ 3000 ft/sec drop at 400yrds is 16.9" and wind drift is 6.4" At 1000yrds the .277 150 gr @3000 ft/sec mv drops 275.7" and drift is 79.7" The .338 300 gr @ 3000 ft/sec mv drops.217.0" and drift is 45.4" So compairing the two is not very fair to the 270 . The point to my reply is that with weight comes BC and ( the higher the weigh in a given dia. the BC will go up as long as it is the same basic shape ( Not spitzer to Round nose ). This is The reason that most long range shooters try to get the Highest BC and velocity there rifle is capable of and weight is the key to higher BC's Just my point of view J E CUSTOM [/QUOTE]
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Any thoughts,400 yards?
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