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Rifles, Reloading, Optics, Equipment
Gunsmithing
Need some advise
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<blockquote data-quote="NesikaChad" data-source="post: 378519" data-attributes="member: 7449"><p>I pulled the BC from Sierra's website.</p><p></p><p>Above 2800fps they call out for a BC of: .488</p><p></p><p>I have an old version of the NightForce ballistic software called Exbal.</p><p></p><p>Unfortunately it does not have a simulator for load data. So I'll be making some rather BOLD ASSUMPTIONS. That means a big salt shaker as all of this will be blue sky BS.</p><p></p><p>I guessed a velocity of the bullet. I know with 125 grain Nosler Ballistic Tips in my 300-338 LM the muzzle velocity is almost 4400fps coming out the gate. </p><p></p><p>I'm going to GUESS that a 168 bullet will be in the 4100 range.</p><p></p><p>So, with that BC here's the numbers:</p><p></p><p>"Drop" figures are in inches, not MOA.</p><p></p><p></p><p>@100: 3871fps Drop: 0 (zeroing distance)</p><p>@500: 2988fps Drop: -32.</p><p>@750: 2517fps Drop: -81.</p><p>@1K: 2092fps Drop: -165.</p><p></p><p></p><p>Again, none of this is really verifiable with the software I have. </p><p></p><p>Good luck.</p><p></p><p>C</p></blockquote><p></p>
[QUOTE="NesikaChad, post: 378519, member: 7449"] I pulled the BC from Sierra's website. Above 2800fps they call out for a BC of: .488 I have an old version of the NightForce ballistic software called Exbal. Unfortunately it does not have a simulator for load data. So I'll be making some rather BOLD ASSUMPTIONS. That means a big salt shaker as all of this will be blue sky BS. I guessed a velocity of the bullet. I know with 125 grain Nosler Ballistic Tips in my 300-338 LM the muzzle velocity is almost 4400fps coming out the gate. I'm going to GUESS that a 168 bullet will be in the 4100 range. So, with that BC here's the numbers: "Drop" figures are in inches, not MOA. @100: 3871fps Drop: 0 (zeroing distance) @500: 2988fps Drop: -32. @750: 2517fps Drop: -81. @1K: 2092fps Drop: -165. Again, none of this is really verifiable with the software I have. Good luck. C [/QUOTE]
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