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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
"Point Blank" Ballistic Programs?
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<blockquote data-quote="waitaminit" data-source="post: 23335" data-attributes="member: 538"><p>Somewhere in PS I read an article named 2Why BC is BS".</p><p>I think the author knows why he used this title.</p><p></p><p>The Sierra Manual lists a BC of .496 for a speed between 2800 and 1800 fps and hops to a BC of .505 for more than 2800. As there is no stepwise increment in BC, one can expect a BC of more than .5 for 2650 fps.</p><p>Your experience shows the opposite.</p><p>A while ago, I talked to a Sierra technician who said they do tests up to 200 yrd, so I wonder from where they know about the long range performance of their bullets.</p><p></p><p>When I use your data in the Perry software, the results are close to yours (378" drop) while Sierra's rangetable shows a drop of about 436".</p><p></p><p>You may need to correct the optimistc Sierra BS-BC, I'm afraid.</p></blockquote><p></p>
[QUOTE="waitaminit, post: 23335, member: 538"] Somewhere in PS I read an article named 2Why BC is BS". I think the author knows why he used this title. The Sierra Manual lists a BC of .496 for a speed between 2800 and 1800 fps and hops to a BC of .505 for more than 2800. As there is no stepwise increment in BC, one can expect a BC of more than .5 for 2650 fps. Your experience shows the opposite. A while ago, I talked to a Sierra technician who said they do tests up to 200 yrd, so I wonder from where they know about the long range performance of their bullets. When I use your data in the Perry software, the results are close to yours (378" drop) while Sierra's rangetable shows a drop of about 436". You may need to correct the optimistc Sierra BS-BC, I'm afraid. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
"Point Blank" Ballistic Programs?
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