260 applied ballistics help... I need some info for ballistic calculator ...

[Rusty Bluck]

ok I been using strelok and my numbers are off.. when I put data in to make 1000 yrd dead on my 600 is low.(close). messed and messed with it and was told to use applied ballistics. So i have the app. now and am having trouble.. would someone walk me threw it.. give me their data used .. here is what I am shooting 42 gn H4350 lapua brass 140 gn hybrid (618 bc) In strelok to get it close I have to use 2750 fps and a bc of 550 .. Its a 24 in barrel 1/10 twist .. shooting 1000 ft elevation in ohio in summer 1.75 scope height.. I dont know powder temp .. divination,,, and so on.. im at 32,25 moa at 1000 and 13 moa at 600 ..17 moa at 700 .. I have shot an advance LR sniper course and have had some high scores.. but have to use to sets of data.. one to 600 and one from 700 to 1200

 

[p51]

Rusty, just to give you a comparison. I run two 260's first is savage action/27in HV McGowan/ptg bolt/manners. #s with 140vld/612g1/2855fps/1.8 sight height/24.98Hg/47*/30%/100zero. 600=11.36moa. 1000=25.30
Second is defiance/25in #4 krieger/manners/sight 2.0/#s are g7.317 140 hybrid/2735fps/24.76Hg/60*/30%/100zero. 600=12.20. 1000=27.02. Couple suggestions, make sure zero is good, and wondering in a 10 twist is stabilizing, both of mine are 8?
First rifle h4350 42.3 Second 44.7 h4831. Using ballistic ae and shooter #'s are identical

 

[Steel head]

Here is my primary load data.
140 BTHP .580 at 2830fps
2.0 sight height
200 yd zero
1857ft
29.7
77 degrees
19%RH

300=6.73
500=7.43
700=13.82
1075=29.4(furthest confirmed shot data)