Lee

I do not think there is any doubt that increasing the pressure on the burn of BH DOES increases the burning efficiency of BH.

WABI

I really do not thik that 110 grains is the top of the spike for T7. If I increase 120 or even 130 with a 300 grain bullet or even a .458/350 grain bullet the powder will increase velocity. It is still not as effecient as BH. I think Spaniel's velocities with the 325 indicate that.