Originally Posted by
JonB_in_Glencoe
No one is splitting hairs.
Faster burning powders spike (pressure) sooner as velocity increases, whereas slower burning powders spike later.
This is why there is a general practice of using faster burning powders for lower velocity loads, and slower burning powders for higher velocity loads.
At the top end of my powders I have, Blue dot will create higher pressures, maybe not lower velocity, yes, BUT say H110 will create lower pressures but still can get the same velocities. So Temps, are the concern no matter what powder you use sure even at lower velocities.
Gas cutting happens when there isn't enough pressure to obturate the boolit. So if you have a undersized boolit, it's more likely to have gas cutting on a low pressure load, than with a High pressure load.