@Bill999 - it will be very educational to see if you can get to the bottom of what was going on here.
Did he definitely have IMR4895? If so where did he get his load data from? I checked the data from IMR and they list a max of 35.9 grains with the 140 A-Max which should be sloshing about in a Creedmoor case.
Is there a possibility he actually had IMR4955? If that were the case it would explain many things as it is similar to H4831/AR2213SC - on the slower side and bulky 100%+ loading density would be expected in the Creedmoor case with a long projectile.
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