Drew;
I may not have worded my post well. I was not saying there would be a rise in pressure when the forcing cone was hit. As mentioned the pressure is falling upon hitting the cone. There "May" be a slight lag in the rate of fall. These results were so far as I am aware of were all taken with breech loaders so doubtful we have similar ML'er curves for comparison.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra