OK. Well I ran your original numbers and I get a result like this:
To get 27 MOA @ 800 you need 2465 fps. To get 5.5 @ 400 you need 2715 fps.
On the computer that says your bullet is slowing down/decreasing at an increasing rate that is not normal. Not only is not normal I think it is impossible. I know, bold statement, but physics is usually pretty honest.
So I am leaning toward 2 things.
- Scope turrent is not tracking perfectly vertically.
- shooter eye alignment with scope bore is changing vertically.
Thanks for your honesty I'm a big boy and I don't take your boldness the wrong way I welcome your honesty. I now have something I can try to correct this problem I have. I will check my trcking on my scope to see if that is the problem, I pay attention to my eye alignment when shooting not to say that is not the problem but will sure try these suggestions. Thanks again.
I can tell you it takes very little mis-alignment to be off 1 MOA at 400 and 2 MOA at 800.
I see it more with prone shooting then BR though. Also, I see it with elevated targets relative to the shooting platform. All of those things tend to tilt your forehead forward and down. This changes your alignment a little which pushes the reticle vertically. I bet if you close your eye's and line up behind the scope, open them, note target alignment, then tilt your forehead forward and down a little you will see the shift in reticle to target alignment.
This may not be happening to you at all, but it does help explain the impact points. BTW- when I shoot my bow at 20 vs 80 my site picture changes a little due to my head positioning. I have mostly corrected this issue but with fixed sights it is not as big a deal. Similar to the bow the rifle has to change position to fling lead long distance. It changes the rifle to shooter position even if it is subtle.
Rookie mistake on my part but I am having the same issue with my other rifle also but not in as great of a distance apart and I have mounted both of these scopes without a level, I am excited about leveling them and trying again. At least I have a direction I was getting very fustrated and shooting a bunch of bullets which is not a bad thing. Thanks again and I will let you know how thing come out in a couple of weeks.