I am also considering this recipe. Any luck or testing this yet yourself?
Hodgedon posts load data for the Sierra 300gr Match King. However this is a shorter projectile compared the Berger 300gr Elite Hunter.
Berger EH - 1.820"
Sierra MK - 1.710"
So the Berger could seat deeper into the case depending where the ogive is of course. This may increase pressures comapared to their load data but if your able to load these longer in your rifle. Such as loading the Berger to 3.71" COAL you should be offsetting the pressure difference. However still working up the load as we all should be.