Thread: Ballistic truing conundrum

Originally Posted by No.3

Have you validated the BC of the bullets is correct to what you are using? Sometimes the advertised figures aren't right and the error you get can be surprising. I didn't see that mentioned anywhere above? It might not explain all of the error you are experiencing but there may be several smaller errors adding up. Have you tried a different chrony as well?

I thought this too, just forgot to added it to my post...
That would also show up by validating at more distances.

Hornady list the BC for the bullet in velocity bands, if you have a multi BC function on your calculator then use that, otherwise using their middle number is generally more accurate.
The G1/G7 BC for the 162 ELD-M is 0.655 / 0.329.

https://www.hornady.com/support/ballistic-coefficient