darker,
I think that QL and I agree with you since I clearly said "seating it out into the chamber decreases the pressure, about 5 fps per 0.010".
That is not backwards and it agrees with your statement, although leakage isn't the only reason the pressure drops. The volume available for gas expansion is greater as well. Both cause the pressure to decrease.
I also said that seating deeper into the case increases the pressure, restricting the volume between the bullet and the powder at ignition which causes the pressure to rise.
That too is correct and I didn't say pressure spiked.
Of course, if you jam the bullet into the rifling, there is a significant pressure spike, much higher than moving the bullet a few thousandths into or out of the brass, but I wasn't referring to jamming the bullet into the rifling.
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