I assume you adjusted it according to the directions here:
http://www.quarterbore.com/library/a...00trigger.html
With some newer Remingtons the trigger spring is just too stiff and there is really no choice but to get a new trigger. If it is gritty, then you may need to hone the sear engagements but this is pretty advanced stuff that I have never tried to do myself.
Good Luck!
Ken