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Help with drop chart please

 
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  #8  
Old 11-13-2003, 06:02 PM
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Join Date: Sep 2003
Location: East Tennessee
Posts: 121
Re: Help with drop chart please

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]images/icons/frown.gif[/img]
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  #9  
Old 11-13-2003, 07:47 PM
 
Posts: n/a
Re: Help with drop chart please

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
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  #10  
Old 11-13-2003, 08:09 PM
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Join Date: Nov 2003
Location: Northern Ontario, CANADA
Posts: 44
Re: Help with drop chart please

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.
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  #11  
Old 11-13-2003, 08:51 PM
 
Posts: n/a
Re: Help with drop chart please

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 ]
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  #12  
Old 11-14-2003, 12:00 AM
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Join Date: Jan 2003
Location: The rifle range, or archery range or behind the computer in Alaska
Posts: 3,418
Re: Help with drop chart please

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
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Quote:
Originally Posted by Broz View Post
Please just answer one very simple question. Why would anyone shooting long range load a low BC , low SD 168 gr offering in a 300 win???????

My answer to this is. The only reason is to make the 7 RM look good. There is no other reason.

Jeff.
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  #13  
Old 11-14-2003, 12:47 AM
Junior Member
 
Join Date: Oct 2001
Location: California
Posts: 13
Re: Help with drop chart please

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 ]
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  #14  
Old 11-14-2003, 11:01 AM
Bronze Member
 
Join Date: Nov 2002
Posts: 56
Re: Help with drop chart please

A big thank you for everyone that helped, it is very appreciated!! [img]images/icons/wink.gif[/img]
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