I've read the regulations but my main question is to anyone who has seen application of the 135 PIC exemption towards your 1000 hours of SIC.

So if someone were to have 700 hours PIC in 135, would Compass consider you for upgrade after 300 hours of 121 SIC?

Everyone here has been talking about bringing in flight hours from other 121 carriers but not any 135/91k operations. That is what got me curious.