Originally Posted by cabelas90
My software says that will get me out to about 725 yrds dose that sound right for a 204 ruger shooting 40 gr v-maxs book says 3600fps out of a 26 in barrel and i have a 20 in barrel. 25.6 gr of H4895. dose this sound about right?
I come up with 62 clicks with a .25 moa per click at 100 yrds scope so thats 15.5 moa of up adjustment. Right?
62*.25 = 15.5 so that's a good calc.
From Hornady's Ballistic Calculator: Why they don't go beyond 500 yds I don't know.
Input Variables Firearm typeRifle Sight Height1.5 Bullet Weight (grains)
40 Ballistic Coefficient.275 Muzzle Velocity (fps)
3600 Temperature60 Barometric Pressure (hg)
29.53 Relative Humidity78% Zero Range (yards)
100 Wind Speed (mph)
JBM says 62 Clicks w/100 yd zero and 1.5 line of sight about line of bore will get you on at 725 yds.
Sounds like you're spot on.
Do an accurate determination of line of sight above line of bore.
Then shoot for zero at different distances.
You may have to fudge the velocity or bc a bit to get the calcs to match the drops but it will be good and does away with the need for a chrono.
Good luck and good shootin'