Good information. I should tape it to the loading bench.
The one point you quoted from Hatcher that I am not clear on is that shoulder shape has no affect on pressure. Maybe in regards to high or low pressure but I thought and you have stated that the 30 degree shoulder appears to produce more uniform pressure according to the ballistics labs.
The same on case shape, no difference, but then some claim a shorter powder column is more uniform.
Also how does this relate to bushed firing pin holes and small rifle primers showing (producing?) less pressure? Lots of questions left for Gun Gack III.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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