Thread: .270 muzzle speed

Greetings again,
I watched an interesting video the other day on the Oehler 89 system. This measures the velocity twice. First at 10 feet using what looks like my 33 year old 35P and again at longer range using IIRC an acoustic ground mounted system. This allows calculation of the actual BC for that load and velocity range. What it also showed up is that the BC varied from shot to shot which surprised me somewhat. Even old dogs can learn new things from time to time. I hate to think what an Oehler 89 system costs in NZ. The first chronograph I used back in the 1980's felt like magic at the time. The 89 is real voodoo stuff.
Regards Grandpamac.