Im not one to really get into ballistics and have a 39 gr. BK load and am wondering if these POI and drift sound right? My load is the following. Im not looking for super precise number but something I can use on coyotes which are big targets.
39 gr. Sierra BK
25 gr. Benchmark
Fed 205 M
3490 fps (approx)
Drop
100 yrd 1.78"
200 yrd 0
300 yrd -7.61
400 yrd -23.77
Drift 10mph / wind dir 90
100 yrd .78"
200 yrd 6.18"
300 yrd 14.41
400 yrd 27.68
Im using the program on Handloads.com/ ballistic calculater. If these sound way off could I send my info to one of you guys who know how to properly figure this out.
Cheers!!
help with ballistic chart
-
acloco
- Senior Member
- Posts: 1708
- Joined: Mon Sep 25, 2006 8:53 pm
- .204 Ruger Guns: 12FV, 12BVSS -S
- Location: Nebraska
Re: help with ballistic chart
Sierra Ballistics Calculator says:
Range(Yards) Velocity(Ft/Sec) Energy(Ft/Lbs) Bullet Path(inches) Bullet Path(1 MoA)
0 3490 1054.6 -1.6 0
50 3311.1 949.2 0.08 0.2
100 3134.3 850.6 0.98 0.9
150 2964.5 760.9 0.98 0.6
200 2801 679.3 0 0
250 2631.1 599.4 -2.09 -0.8
300 2467 527 -5.44 -1.7
350 2308.8 461.5 -10.22 -2.8
400 2112.8 386.5 -16.64 -4
450 1924.3 320.6 -25.02 -5.3
500 1747.1 264.3 -35.74 -6.8
550 1583.2 217 -49.33 -8.6
600 1434.7 178.2 -66.39 -10.6
Hornady Ballistics Calculator (online at Hornady's site) says:
39 BK 39 gr., .270 B.C. www.hornady.com
Range (yards) Muzzle 100 200 300 400 500 600 700 800 900 1000
Velocity (fps) 3490 3104 2751 2424 2119 1839 1585 1365 1189 1066 982
Energy (ft.-lb.) 1055 834 655 509 389 293 217 161 122 98 84
Trajectory (200 yd. zero) -1.5 1.1 0.0 -5.6 -17.2 -36.6 -66.4 -110.2 -172.9 -260.2 -376.4
Come Up in MOA -1.5 -1.0 0.0 1.8 4.1 7.0 10.6 15.0 20.6 27.6 35.9
Both of these agree with each other....at least withing one tenth of an inch at 300 yards.
Range(Yards) Velocity(Ft/Sec) Energy(Ft/Lbs) Bullet Path(inches) Bullet Path(1 MoA)
0 3490 1054.6 -1.6 0
50 3311.1 949.2 0.08 0.2
100 3134.3 850.6 0.98 0.9
150 2964.5 760.9 0.98 0.6
200 2801 679.3 0 0
250 2631.1 599.4 -2.09 -0.8
300 2467 527 -5.44 -1.7
350 2308.8 461.5 -10.22 -2.8
400 2112.8 386.5 -16.64 -4
450 1924.3 320.6 -25.02 -5.3
500 1747.1 264.3 -35.74 -6.8
550 1583.2 217 -49.33 -8.6
600 1434.7 178.2 -66.39 -10.6
Hornady Ballistics Calculator (online at Hornady's site) says:
39 BK 39 gr., .270 B.C. www.hornady.com
Range (yards) Muzzle 100 200 300 400 500 600 700 800 900 1000
Velocity (fps) 3490 3104 2751 2424 2119 1839 1585 1365 1189 1066 982
Energy (ft.-lb.) 1055 834 655 509 389 293 217 161 122 98 84
Trajectory (200 yd. zero) -1.5 1.1 0.0 -5.6 -17.2 -36.6 -66.4 -110.2 -172.9 -260.2 -376.4
Come Up in MOA -1.5 -1.0 0.0 1.8 4.1 7.0 10.6 15.0 20.6 27.6 35.9
Both of these agree with each other....at least withing one tenth of an inch at 300 yards.