I have made a load with 200 grains bearclaw for my .300 win. mag. It's precis.
I have measured caseheard exspansion - and there is none. Primers look good, but one brass did crack in the neck. I'll just be sure that I'm not playing in the dangerous area - with out knowing. I'm well awre that Quickload can't tell the hole truth - but I just hope/think the the brass has hardend due to too much sizing or to many fires.