Hornady 4dof issue

[LC 6.5 Shooter]

Running 147elds @ 2712 avg on my magnetospeed v3. Shot My 101 yd zero. was -0.271” low on 5 shot avg. (.3 moa group) Input all the enviro data from my weathflow meter for the zero angle. Then ran the solver for 303 yds (all I have). It spit out 1.16mils up. I came up 1.2mils. I shot 5 shots and shot a .55 moa at 303 yds. Avg height above zero was 1.80” Going from axial factor of 1.00 to 0.90 only change the vertical 0.24”. Not even close to 1.80”. Even if I only came up 1.1mils it should still be 0.80” above zero and still couldnt adjust the axial factor to that. Any suggestions. Im gonna redo the whole thing tomorrow. I was hoping 300yds would show something since thats all the range I have locally.

 

[Sticks]

Having the same fun myself. I've tried the zero angle and axial out to 750, and the next session was a waste of ammo and POI .5 mil low.

Going to mindwipe my saved data, and start fresh. From what I have gathered, all data must be nuts on, or you're entering in garbage that will magnify. I may already have too much scope error (tall target test showed a 1.8% error in scope travel) to get it working.

 

[_Windrider_]

Running 147elds @ 2712 avg on my magnetospeed v3. Shot My 101 yd zero. was -0.271” low on 5 shot avg. (.3 moa group) Input all the enviro data from my weathflow meter for the zero angle. Then ran the solver for 303 yds (all I have). It spit out 1.16mils up. I came up 1.2mils. I shot 5 shots and shot a .55 moa at 303 yds. Avg height above zero was 1.80” Going from axial factor of 1.00 to 0.90 only change the vertical 0.24”. Not even close to 1.80”. Even if I only came up 1.1mils it should still be 0.80” above zero and still couldnt adjust the axial factor to that. Any suggestions. Im gonna redo the whole thing tomorrow. I was hoping 300yds would show something since thats all the range I have locally.

If you were low at 101 yards, your true range zero is not 101. 4 DOF requires true range zero to work.

 

[pell1203]

LC 6.5 Shooter, my guess is your bullet at 101 yards is still rising and your true zero is somewhere in the vicinity of 160 yards. This will result in close to a 1.8" high impact at 300 yards.

There are several videos on YouTube that show how the 4 DOF calculator works. There is a detailed one on how to compute the true zero.

Hornady 4 DOF - How to Determine Your Zero Distance

You should watch the other videos as well. They are quite informative.