300 WM DOPE

[TriggerHappy0125]

I am shooting 180 Nosler Accubonds my Magneto Speed indicates 2980 FPS. 1.75” scope height. When I plug that into ballistic I get a 1 mil (10 .1mil clicks) adjustment for 300 yards. That puts me shooting very high. I walk it down and get 4 clicks or 0.4 mil adjustment to hit dead center. But if I made that correction in ballistic it puts my muzzle velocity at around 3700 FPS. Ballistic coefficient .507 G1 drag model. What hell am I doing wrong

 

[HiDesertELR]

What station pressure are you using? Barometric or station pressure? Read this...
barometric-pressure-vs-station-pressure

1.75" Scope height? Are you measuring from center of rifle bore?

 

[Deleted member 113831]

With the round you are shooting, your 300 yard come up from a 100 yard zero would be right at 1 mil.

It would be 0.4 if you had a 200 yard zero on the gun.

You have a zero issue. There is absolutely no way you have an actual 0.4 mil come up from 100 yards with that combination. Not even at 10000 ft elevation.