bj,
Here is one done for the 120NBT
The manufacturer claims .458
The radar with JBM's online calculator gives .425
The radar starts to lose track of bullets after 50m. The good news is it doesn't look like it matters as you can calculate a BC from as close as 10m.
![[Image: Y3CsyT.gif]](http://i.cubeupload.com/Y3CsyT.gif)
BTW, I didn't fire 32 rounds just to get a new BC. I was shooting groups and steel and had the radar on next to me on the bench. After I saw your post I pulled the file and calculated the BC's. That's the beauty of the LR. You do your normal shooting and it sits next to you recording velocities whether you want them or not.
(the environmental factors came from a Kestrel).
Here is one done for the 120NBT
The manufacturer claims .458
The radar with JBM's online calculator gives .425
The radar starts to lose track of bullets after 50m. The good news is it doesn't look like it matters as you can calculate a BC from as close as 10m.
BTW, I didn't fire 32 rounds just to get a new BC. I was shooting groups and steel and had the radar on next to me on the bench. After I saw your post I pulled the file and calculated the BC's. That's the beauty of the LR. You do your normal shooting and it sits next to you recording velocities whether you want them or not.
(the environmental factors came from a Kestrel).