Ok, I know there are lots of sites out there with ballistics software. I have tried 4 different ones and I guess I am just not smart enough to figure them out. I can't figure out how to change the zero of the programs. Anyone smarter than I am who could run a quick ballistics check for me?

280 Rem. = .284
150gr Nosler partitions = BC 0.457
Velocity of approx 2880 fps (avg from chrono)
Sighted in + 2.5" (inches) at 100 yards
Average elevation of hunt = 11,000ft
barrel length - 24" overall
Need info out to 500 yards at 50 yard increments. (Not that I will shoot that far)

Any help would be greatly appreciated.

MC

The JBM Ballistic program is the one you need but I'll be damn if I can figure out how to post a link to it on this Forum.

Anyway, using your input here's the basics

100 yards +2.5
150 yards +2.2
200 yards +1.4
250 yards +0.5
300 yards -0.5
350 yards -1.7
400 yards -2.9
450 yards -4.2
500 yards -5.5

Maybe somebody can help in posting a link. I go to the site, copy the URL, then go to "Reply" on the Forum but there is no way to paste the URL into the reply. Am I doing something wrong or maybe I don't have permission to copy and paste???

Ray

Hit the "Reply" button first and let it open a window. Leave it up and then open another web browser and go to the webpage that you want to make the link to;

Highlight the web page name, right click and hit "copy". Then go to the open "Reply" window, right click and hit "paste"

http://www.eskimo.com/~jbm/ballistics/traj_basic/traj_basic.html

Dang it Frank, you make it look so easy. I think it was you who sent me instructions on how to post a link but I cannot get it to work on my machine. Everything works until I get to the "Paste" part and then everything turns to $hit.

Ray

http://www.eskimo.com/~jbm/ballistics/traj/traj.html

Well when you try and copy and paste you get all the data.

The zero heights is 2 boxes blow velocity
The Zero distance is 6 boxes down from height and one to the right.

8 inches of drop at 500 yards didn't seem right so I tried running it at JBM; this is what I got. It's pretty messy just pasting it; the first two columns are the ones you're looking for:

Range Drop Drop Windage Windage Velocity Mach Energy Time Lead Lead
(yds) (in) (moa) (in) (moa) (ft/s) (none) (ft•lbs) (s) (in) (moa)
0 -1.5 *** 0.0 *** 2880.0 2.580 2762.1 0.000 0.0 ***
50 1.1 2.1 0.1 0.2 2820.3 2.526 2648.7 0.053 9.3

100 2.6 2.5 0.4 0.4 2761.3 2.473 2539.2 0.106 18.7

150 2.9 1.9 0.9 0.6 2703.2 2.421 2433.4 0.161 28.4

200 2.1 1.0 1.6 0.8 2645.8 2.370 2331.2 0.217 38.3

250 -0.0 -0.0 2.5 1.0 2589.2 2.319 2232.4 0.275 48.3

300 -3.4 -1.1 3.7 1.2 2533.2 2.269 2137.0 0.333 58.7

350 -8.1 -2.2 5.0 1.4 2478.0 2.219 2044.8 0.393 69.2

400 -14.3 -3.4 6.6 1.6 2423.5 2.171 1955.8 0.454 80.0

450 -21.9 -4.6 8.5 1.8 2369.6 2.122 1869.8 0.517 91.0

500 -31.1 -5.9 10.6 2.0 2316.4 2.075 1786.8 0.581 102.2

Frank

IT WORKED! Don't ask me how or why. I think it was the right click that was the secret. When I left clicked the Reply window closed.

Many thanks

Ray

AZ223 & MC

I see why my numbers were confusing. I was posting in MOA, not inches. My long range shooting background is showing through.

http://www.eskimo.com/~jbm/ballistics/traj_basic/traj_basic.html

See Frank!!! I can do it.

Ray

My LOAD FROM DISK come up with numbers that are a lot different than Cheechako's numbers. I corrected the B.C. for 11000ft standard temp. and pressure, it changed to .633. My hights are 0yd -1.5", 50 1.05, 100 2.50, 150 2.78, 200 1.82, 250 -.45, 300 -4.14, 350 -9.26, 400 -15.92, 450 -24.21, and 500yds is -34.24". I got the 100yd hight by moving the POINT BLANK range up and down till it was at 2.5"

Wow- That was sure fast. Those are close to the numbers I came up with so I really appreciate all your help and efforts. THANKS

Cheechako- I have another question I am posting in a different topic. Look at it and help me out.

quote:

Originally posted by Fat_Albert:
My LOAD FROM DISK come up with numbers that are a lot different than Cheechako's numbers. I corrected the B.C. for 11000ft standard temp. and pressure, it changed to .633. My hights are 0yd -1.5", 50 1.05, 100 2.50, 150 2.78, 200 1.82, 250 -.45, 300 -4.14, 350 -9.26, 400 -15.92, 450 -24.21, and 500yds is -34.24". I got the 100yd hight by moving the POINT BLANK range up and down till it was at 2.5"

Albert

As I noted above, my post was in MOA. But even when I convert it to inches the difference is still more than 5 inches at 500 yards. I'm not sure if JBM changes the BC of the bullet for elevation. You just enter 11,000 feet and it does the rest. I did indicate "Std Atmosphere at Altitude". I also entered a zero distance of 275 yards which gave me the +2.5 at 100.

This shows that using ballistic programs is OK to get you in the ballpark but you still have to actually shoot at the distance to verify everything. At 1000 yards I am usually within 1 or 2 MOA with my first shot when I sight in at 100 yards using numbers from JBM. I figure that is pretty darn good considering all the things that can happen to the bullet while travelling 3000 feet.

Ray

Cheechako - I see my error; after I posted I realized what you were doing.

You're getting within 1 or 2 MOA at 1000 crunching these numbers? Wow...At least I know it's a reasonable guide for future use; I haven't shot that far yet but I want to eventually.

MC, running the exc. Sierra program I get this (sorry, couldn't figure out how to cut & paste from it):
100 = +2.5"
200 = +1.9"
300 = -3.7"
350 = -8.6"
400 = -15"
450 = -22.9"
500 = -32.5"
3-9/10mph wind drift @ 400yds = 7.6"
Good hunting!

Range
yds Path
in ComeUp
clicks Velocity
fps Energy
ft/lbs Momentum
lb ft/s ToF
sec Windage
in Windage
clicks Optimal
Game Wgt
Muzzle -1.5 Infinity 2880 2762 61.71 0.000 0.0 NaN 806
25 0.1 -1 2843 2692 60.92 0.026 0.0 0 775
50 1.4 -11 2806 2622 60.13 0.053 0.1 1 746
75 2.5 -13 2769 2554 59.34 0.080 0.3 1 717
100 3.2 -12 2733 2488 58.57 0.107 0.5 2 689
125 3.7 -11 2697 2423 57.80 0.135 0.8 2 662
150 3.9 -10 2662 2359 57.03 0.163 1.1 3 636
175 3.8 -8 2626 2297 56.28 0.191 1.5 3 611
200 3.3 -6 2591 2236 55.53 0.220 2.0 4 587
225 2.5 -4 2557 2177 54.78 0.249 2.6 4 564
250 1.4 -2 2522 2119 54.05 0.278 3.2 5 541
275 0.0 0 2488 2062 53.31 0.308 3.9 5 520
300 -1.8 2 2454 2006 52.59 0.339 4.6 6 499
325 -4.0 5 2421 1951 51.87 0.370 5.4 6 479
350 -6.5 7 2387 1898 51.16 0.401 6.4 7 459
375 -9.4 10 2354 1846 50.45 0.432 7.3 7 440
400 -12.7 12 2322 1795 49.75 0.464 8.4 8 422
425 -16.4 15 2289 1746 49.06 0.497 9.5 9 405
450 -20.5 17 2257 1697 48.37 0.530 10.8 9 388
475 -25.0 20 2225 1649 47.69 0.563 12.1 10 372
500 -30.0 23 2194 1603 47.01 0.597 13.5 10 356

Here's the results I got from http://www.biggameinfo.com/index.aspx?page=/balcalc.ascx . 25-yard range intervals.

Zero range is 275 yards. First figure is range, second figure is bullet path (in.).

Forth figure is vel. at each range; fifth is energy. last fogure on right is "optimal game weight for that particular energy level... (Very subjective)