SJan
NES Member
Standard deviation.
The average velocity using powder 'A' could be compiled from a huge spread of 50-100 fps and show poor accuracy on your target.
While the same average velocity using powder 'B' is compiled from a tighter sampling of 10fps or less and will more likely result in great accuracy.
The average velocity using powder 'A' could be compiled from a huge spread of 50-100 fps and show poor accuracy on your target.
While the same average velocity using powder 'B' is compiled from a tighter sampling of 10fps or less and will more likely result in great accuracy.