Help with drop chart please

Discussion in 'Long Range Hunting & Shooting' started by Obsessed, Nov 13, 2003.

  1. Obsessed

    Obsessed Well-Known Member

    Messages:
    56
    Joined:
    Nov 21, 2002
    I need to ask you guys a huge favor, could you please help me with a drop chart for the following:
    300 Win Mag
    168gr SMK .462BC?
    3200 on Chrono
    3965 Elevation
    35 degrees
    no wind
    out to 750 yards
    100 yard zero
    Could I get your calculations in inches and clicks on a 6.5-20X50 leupold.
    Help is sincerely appreciated!!
    Thanks guys.

    [ 11-13-2003: Message edited by: Obsessed ]
     
  2. Mpvoigt

    Mpvoigt Member

    Messages:
    13
    Joined:
    Oct 26, 2001
    Here is your drop table in inches...

    Range Drop (inches)
    0 -2
    25 -1.17
    50 -0.55
    75 -0.16
    100 0
    125 -0.08
    150 -0.41
    175 -0.99
    200 -1.84
    225 -2.96
    250 -4.36
    275 -6.05
    300 -8.04
    325 -10.34
    350 -12.96
    375 -15.91
    400 -19.2
    425 -22.85
    450 -26.86
    475 -31.25
    500 -36.04
    525 -41.24
    550 -46.85
    575 -52.91
    600 -59.42
    625 -66.4
    650 -73.87
    675 -81.85
    700 -90.36
    725 -99.42
    750 -109.05
     

  3. rolltide

    rolltide Well-Known Member

    Messages:
    139
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    Sep 21, 2003
    What program are you guys using? I am trying to get an idea on my bullet trajectory before I get to shoot. That way, I should be close.

    Thanks,

    CC
     
  4. Mpvoigt

    Mpvoigt Member

    Messages:
    13
    Joined:
    Oct 26, 2001
    There are several programs that will help get you on target...

    I use Perry systems and Horus Vision on Palm pilot for field use. I have both of the above plus the Sierra program on PC.

    The Horus Vision has the most features (spin drift, temperature/velocity correction, etc.) but needs some tweaking to get actual results to match calculated results from my experiance.

    The Perry system is the closest program I have used to match field results to calculated predictions. It also has a direct output to excel that really cuts down on the time to make table for the field.

    The Sierra program is very good in that it allows several loads, bullets, velocities to be tracked and compared.

    They ALL need to be proven in the field before live ammo goes towards live targets!


    MV

    [ 11-13-2003: Message edited by: Michael Voigt ]
     
  5. *WyoWhisper*

    *WyoWhisper* Guest

    I use the Exbal program.. has always been dead on...
    Only problem is you have to run each bullet seperately.... but this is the mot accurate program I have used
     
  6. DANTEC

    DANTEC Well-Known Member

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    Jul 6, 2002
  7. Thunder Hunter

    Thunder Hunter Active Member

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    Nov 12, 2003
    Rolltide all these are great programs. The one I use is from BARNES, and is in language we understand.
     
  8. rolltide

    rolltide Well-Known Member

    Messages:
    139
    Joined:
    Sep 21, 2003
    I tried the Eskimo progam. It seems to be pretty good. My load is:

    .308
    44.5 gns Varget
    175 SMK MOLY
    2640 FPS

    Am I right that the drop is 153 clicks at 1000 with a 100 yard zero?

    Thanks for the help,

    CC

    P.S. - OBSESSED, I didn't mean to hijack your thread. Sorry.
    [​IMG]
     
  9. Guest

    Guest Guest

    I have never used a trajectory program. All my drop charts come from range work. The programs might save me time and bullets! What is the drag function. What should I use for the SST bullet in 270cal or the SMK. Thanks
     
  10. Thunder Hunter

    Thunder Hunter Active Member

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    Nov 12, 2003
    Harv: On the Barnes program we need to know and I assume the other programs are the same, The BC of the Bullet, Weight (grs) etc. to do the calculation.
     
  11. Guest

    Guest Guest

    On the eskimo program it askes for a drag function G1, G2 ect. Just wondering which one is needed for the SST or SMK bullet?

    [ 11-13-2003: Message edited by: Harv ]
     
  12. Michael Eichele

    Michael Eichele Well-Known Member

    Messages:
    3,829
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    Jan 6, 2003
    Name: 308 Cal, Sierra HPBT, 168 grn
    Ballistic Coeff: 0.481
    Bullet Weight: 168
    Velocity: 3200
    Target Distance: 100
    Scope Height: 1.500
    Temperature: 35
    Altitude: 3965

    Ballistic Data
    ~~~~~~~~~~~~~~~
    Range Elevation Velocity Energy ETA Drop Max Y 10mph Wind Deflect
    0 yds -1.50 in 3200 fps 3820 fpe 0.000 sec 0.00 in -1.50 in 0.00 in
    25 yds -0.79 in 3152 fps 3706 fpe 0.024 sec 0.11 in -0.57 in 0.04 in
    50 yds -0.30 in 3105 fps 3596 fpe 0.048 sec 0.43 in -0.49 in 0.14 in
    75 yds -0.04 in 3058 fps 3489 fpe 0.072 sec 0.98 in -0.35 in 0.29 in
    100 yds -0.00 in 3012 fps 3384 fpe 0.097 sec 1.76 in -0.15 in 0.49 in
    125 yds -0.21 in 2966 fps 3282 fpe 0.122 sec 2.78 in 0.12 in 0.78 in
    150 yds -0.65 in 2921 fps 3182 fpe 0.147 sec 4.05 in 0.45 in 1.12 in
    175 yds -1.35 in 2876 fps 3086 fpe 0.173 sec 5.57 in 0.85 in 1.54 in
    200 yds -2.33 in 2832 fps 2991 fpe 0.199 sec 7.35 in 1.33 in 2.05 in
    225 yds -3.57 in 2788 fps 2899 fpe 0.226 sec 9.41 in 1.88 in 2.63 in
    250 yds -5.10 in 2744 fps 2810 fpe 0.253 sec 11.76 in 2.51 in 3.30 in
    275 yds -6.92 in 2701 fps 2722 fpe 0.281 sec 14.39 in 3.23 in 4.04 in
    300 yds -9.03 in 2659 fps 2637 fpe 0.309 sec 17.32 in 4.03 in 4.85 in
    325 yds -11.45 in 2617 fps 2554 fpe 0.337 sec 20.55 in 4.93 in 5.73 in
    350 yds -14.18 in 2575 fps 2473 fpe 0.366 sec 24.10 in 5.91 in 6.69 in
    375 yds -17.22 in 2533 fps 2394 fpe 0.395 sec 27.95 in 7.00 in 7.71 in
    400 yds -20.63 in 2492 fps 2317 fpe 0.425 sec 32.19 in 8.19 in 8.86 in
    425 yds -24.32 in 2452 fps 2242 fpe 0.455 sec 36.69 in 9.48 in 10.02 in
    450 yds -28.40 in 2411 fps 2169 fpe 0.486 sec 41.58 in 10.88 in 11.29 in
    475 yds -32.86 in 2371 fps 2098 fpe 0.517 sec 46.86 in 12.41 in 12.68 in
    500 yds -37.73 in 2332 fps 2028 fpe 0.549 sec 52.55 in 14.06 in 14.17 in
    525 yds -43.02 in 2293 fps 1961 fpe 0.582 sec 58.65 in 15.85 in 15.78 in
    550 yds -48.73 in 2254 fps 1895 fpe 0.615 sec 65.17 in 17.78 in 17.49 in
    575 yds -54.87 in 2216 fps 1831 fpe 0.649 sec 72.13 in 19.85 in 19.30 in
    600 yds -61.45 in 2178 fps 1769 fpe 0.683 sec 79.53 in 22.07 in 21.21 in
    625 yds -68.48 in 2140 fps 1708 fpe 0.718 sec 87.38 in 24.45 in 23.22 in
    650 yds -75.97 in 2102 fps 1649 fpe 0.753 sec 95.68 in 26.97 in 25.32 in
    675 yds -83.92 in 2065 fps 1591 fpe 0.789 sec 104.45 in 29.66 in 27.51 in
    700 yds -92.34 in 2029 fps 1535 fpe 0.826 sec 113.68 in 32.52 in 29.79 in
    725 yds -101.52 in 1993 fps 1481 fpe 0.863 sec 123.67 in 35.63 in 32.33 in
    750 yds -110.80 in 1956 fps 1428 fpe 0.900 sec 133.77 in 38.80 in 34.72 in

    I dont have time right now to do clicks but if it helps,

    bullet drop in inches divided by (.250*Range/100)

    Eg. 500 yards/100=5. 5*.250= 1.25 -40" at 500 yards/1.25=32 clicks

    Hope that helps
     
  13. Mpvoigt

    Mpvoigt Member

    Messages:
    13
    Joined:
    Oct 26, 2001
    Obsessed,

    Here is a chart with elevation (1/4moa clicks) based on your bullet, velocity, altitude and temperature.


    RANGE clicks
    0 0
    25 17 3/4
    50 4 1/4
    75 3/4
    100 0
    125 1/4
    150 1
    175 2 1/4
    200 3 2/4
    225 5
    250 6 3/4
    275 8 2/4
    300 10 1/4
    325 12 1/4
    350 14 1/4
    375 16 1/4
    400 18 1/4
    425 20 2/4
    450 22 3/4
    475 25 1/4
    500 27 2/4
    525 30
    550 32 2/4
    575 35 1/4
    600 37 3/4
    625 40 2/4
    650 43 2/4
    675 46 1/4
    700 49 1/4
    725 52 2/4
    750 55 2/4

    What a pain to post excel spreadsheets...
    I am sending a spreadsheet attachment in an email to you with more data in an easier to read format.

    [ 11-13-2003: Message edited by: Michael Voigt ]
     
  14. Obsessed

    Obsessed Well-Known Member

    Messages:
    56
    Joined:
    Nov 21, 2002
    A big thank you for everyone that helped, it is very appreciated!! [​IMG]