The way I see it.....
Whenever I train in or fly an N reg, I log under the FARs, ie. Dual received AND PIC. When I fly a G reg, I log under the JARs, Ie. Dual received.This is because I was once told by a dual rated FAA / JAA FI that the logging also depended upon the aircraft registration. Theoretically the P1US hours are loggable as PIC according to the FARs BUT becasue these hours were logged in a G reg (I assume) A/C with a JAA FI then they have to stay as P1US or Dual Received, but not PIC.
It is unusual not to have 250hrs PIC by the time you're ready for the FAA ATP GFT. FAA ATP writtens can be done anytime. FAA ATP flight test can only be done after 1500hrs TT.....
EA