Yes; pressure is lost if the bearing clearence is to wide and the pressure(s)Tony posted is usually what they run, unless the pump relief valve is altered to raise it.
When you installed the cam were you very carfull NOT to scratch any of the bearings??
This too, will do it (although rare) in engine assembly.
Either way; Being within 'normal' factory specs. (but low) you'll still need to watch it closely. If it goes ANY lower after 'break in', I would find out why etc.
Good luck.
