I disagree that an IMCR pilot should call a PAN upon inadvertent entry into IMC
If I remember correctly, when the idea of an IMC-rated pilot (assuming he is current) declaring a Pan on inadvertent entry into IMC was originally raised (way back before we got side-tracked) in a specific scenario where the pilot was not only below MSA, but actually below the level of terrain (hills and masts) nearby. In this case, yes I would declare a Pan, no question at all. In fact, a Mayday may be more appropriate, since there is no doubt I need help immediately. Once above the MSA, though, the emergency can be cancelled, and I can continue flying IFR.
FFF
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