Powder curve vs. bullet exit

[woodsman]

What would the burn curve of a powder load look like if it was plotted on a chart? And what point on that curve would be optimum for bullet exit of the barrel, in terms of velocity?

 

[Ol` Joe]

The little "tics" at the bottom of the slope are the bullet exit points, This is a trace from a 65x55 hooked to a RSI pressure trace unit.

 

[woodsman]

That is exactly what I was talking about.
I had used some VV N560 in a load for my .260 Rem. 20" barrel, and had a lot of muzzle blast. This powder may be good if the rifle had a longer barrel.
So the bullet exit is probably up much higher on the burn curve since there is a lot of muzzle blast.
Thanks a lot.