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This is but one demonstration of what I have long preached: the bullet can and does have a tremendous effect on pressures. The result is that one simply cannot use data for another barnd of bullet, even of the same weight.
Bearing length, jacket hardness, core hardness and ogive shape are important, as are presence or absence or cannelures, grooves or boattail.
Use the bullet maker's data as your primary load data source. Do crosscheck with the powder maker's data to see if there are any major discrepancies. If the bullet maker's charge or velocity are consistently lower, their bullets are creating higher pressure. It's that simple.
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