Thread: Ballistic truing conundrum

I'd be inclinded to try truing it at a few different ranges, say 350y and 500y.
That will tell you if your velcoity is right or not.

Unless the atmposherics are messed up in your ballistic calculator (seems unlikely that both would be out), it's either;
-Bad zero (It'll be easy to see if your zero was off 1 moa, 2"@ 200yards)
-Your scope
-Your chrony (if the 284 was ok then rule that out)
-Funky stuff happening with wind down range (if you didn't notice the same issue with the 284 then rule that out too).

The scope might not be dialing correctly (Gimp had a video a few years back of a Mark 6 that dialed on the piss). You can test this by doing a box test, or just a simple elevation test. I had a VX5 that didn't dial right, the clicks were quite calibrated/manufactured correctly.
If you can easily pull the scope off and put it on a 22 then you can do a full "tall target" tracking test without wasting 30 rounds of 7SAUM ammo.