I have seen this sort of thing happen before with the 7 RM,where manual loads failed to deliver the stated velocities and were considerably slower than what the manual states.

Drop is excessive at 300 yards and beyond and the shooters wonders why(?). Invariably the manual data is taken for granted and the shooter did not chronograph the load to get actual velocity (or at least as close as possible).

The reason I am wondering out loud what the velocities are and if the load was chronographed?

So long as velocities have been up to par I have never seen an issue with the NPT, the AB, nor the 162 Amax out to 600 yards.




The 280 Remington is overbore.

The 7 Rem Mag is over bore.