7MM Mag sighted in at 50 yds.

Discussion in 'Large-Bore/Small-Bore Rifle/Shotgun' started by 1 Eyed Jack, Sep 1, 2011.

  1. 1 Eyed Jack

    1 Eyed Jack New Member

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    Using Winchester 150 gr Power Points, muzzle velocity 3090fps, in a BAR, and sighted in dead on at 50 yds., what would be your best guess at what the POI would be at 100 yds.? 1" high, 2" low?
  2. USMCSpeedy

    USMCSpeedy Member

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    Here is a link to some reasonably priced software that you can download to tell you. I use it and find that it is pretty close to right on. http://www.ballistics-software.com/shoot.htm I would say that you're gonna be about 1/2" to 3/4" high at 100 yards without actually checking.
  3. 1 Eyed Jack

    1 Eyed Jack New Member

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    Thx Speedy, I used to have a link that showed bullet flight characteristics for different calibre's,manufacturer, projectile weight etc, such as bullet rise in the first 100 yds, fall in the next hundred, next hundred etc, anyone have a link for this/
  4. USMCSpeedy

    USMCSpeedy Member

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    Last edited: Sep 1, 2011
  5. JLA

    JLA Well-Known Member

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    http://www.hornady.com/cgi-bin/ball...rom=30.00&zero=50&wspd=5&calcbutton=Calculate

    The only problem with sighting a rifle in so close is bullet yaw. You can get it hitting dead center at 50 yds ab its likely to be off by an inch or more at 100.

    I calculated this using handgun setting to show you the short range trajectory. BC is .344 on the 7mm 150 gr power points.

    Heres rifle & long range rifle bullet drop charts..

    Rifle: http://www.hornady.com/cgi-bin/ball...rom=30.00&zero=50&wspd=5&calcbutton=Calculate

    Long range rifle: http://www.hornady.com/cgi-bin/ball...rom=30.00&zero=50&wspd=5&calcbutton=Calculate
    Last edited: Sep 1, 2011
  6. 1 Eyed Jack

    1 Eyed Jack New Member

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    Thanks guys,

    JLA, talk about "ask and ye shall receive" :) exactly what I needed, great info and better than the link/info I had before, thank you kindly Sir,
  7. JLA

    JLA Well-Known Member

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  8. Old Steve

    Old Steve New Member

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    Quicktarget calculates that you will be 1 inch high at 100 yds, peak 1.05 inch at 130 yds, line of sight at 185 yds. I assumed scope LOS is 1.97 inch above bore, scope height makes quite a bit of difference in this kind of calculations.
  9. 1 Eyed Jack

    1 Eyed Jack New Member

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    Thx Steve, I'll check the scope height and post again,1.97 should be close, the scope has a 40mm obj, and is mounted about as low as you can get it, interesting, as the above numbers differ slightly from the Hornady info, I'll check and get back later,
  10. 1 Eyed Jack

    1 Eyed Jack New Member

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    Center of barrel to center of scope is 1 5/8", so 1.625"?
  11. JLA

    JLA Well-Known Member

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  12. bluesea112

    bluesea112 Active Member

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