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bc. for federal classic 7mm rem mag

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  #1  
Unread 08-19-2008, 05:55 AM
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Join Date: Aug 2008
Posts: 5
bc. for federal classic 7mm rem mag

l have just bougt 200 cartridges of federal classic 7mm rem mag hi~shock 150 grain
l have searched every where but l couldnt find the bc for them does any of u guys know what the bc. is?

thanks.:confused:
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  •   #2  
    Unread 08-19-2008, 09:55 AM
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    Join Date: Oct 2005
    Location: Great Falls, MT
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    Re: bc. for federal classic 7mm rem mag

    Sierra game king .436

    Nosler BT .495
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      #3  
    Unread 08-22-2008, 09:40 AM
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    Location: Arkansas (Home of Record)
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    Re: bc. for federal classic 7mm rem mag

    Call them and ask.

    If you have access to a chronograph and an extended range to shoot at you can pretty much find out for yourself. Chrony the load in your rifle, at least 10 rounds for a good average velocity. Shoot the load for groups at 100 yard intervals. The further the better. Make a drop chart. Punch in all your known info into JBM and fidget with the BC until the drop numbers match your drop chart numbers. This would give you a good idea of what it is. The more detailed you get the closer your outcome will be..ie, don't let the rounds bake in the sun or a warm chamber, make your drop chart in inches of drop if you haven't made sure the adjustments on the scope are precise, and...the list can go on and on.
    I would start at around .350 for BC. It may be higher but if a spbt GameKing is only a little over .4 then the flat based Federal round will be lower.
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      #4  
    Unread 09-08-2008, 08:53 AM
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    Join Date: Aug 2008
    Location: Texas
    Posts: 20
    Re: bc. for federal classic 7mm rem mag

    Shoot! lists the BC of 150 grain Hi-Shock as 0.345. A word of caution, though, I have seen times when Shoot! disagreed with the BC published by Nosler or Barnes.

    Good luck.
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