You try this new powder. 7-08, 120 ttsx. You are not seeing any pressure sign. Velocity is very high and you are not near max. Exactly what velocity do you stop at?
Personally, if I had data for the bullet I was shooting (not a different 120-grainer) I'd stop at the max "book" velocity, regardless of the powder charge, taking into account any difference in barrel length.
Based on the theory that my rifle is at max pressure when I see max velocity.
