Just remember what's legit or legal doesn't mean it's accepted or even tolerated. Prior to upgrading at my previous gig (135 charter) I had logged PIC time on legs I flew in the King Air. I had the necessary endorsements and the 135 SIC training.

A while after I upgraded I heard that several companies refuse to recognize the time since you're not responsible for the aircraft. During interviews two regionals told me they wouldn't have taken the time, even if it had been logged as SIC.

People think it's all fancy to grab that turbine PIC as early as they can, but unless you're signing the paperwork and putting your ass on the line for the flight, you may find that logging that time comes back to bite you.