bc. for federal classic 7mm rem mag

Discussion in 'The Basics, Starting Out' started by 7mm rem ibex down, Aug 19, 2008.

  1. 7mm rem ibex down

    7mm rem ibex down Member

    Aug 18, 2008
    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?

  2. MT4XFore

    MT4XFore Well-Known Member

    Oct 20, 2005
    Sierra game king .436

    Nosler BT .495

  3. Bravo 4

    Bravo 4 Well-Known Member

    Jul 20, 2007
    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.
  4. TxAggie94

    TxAggie94 Member

    Aug 8, 2008
    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.