APX100 doesn't lay down "hot" contrasty negatives - and you don't want it to. This is the responsibility of the printing phase, by far.
Also, try 1+50 and adjust accordingly, as it's a better known match with APX100 (although 1+25 won't do anything bad). Even then, do not expect contrasty negatives. Expect flattish grey looking negatives.
You don't want a contrasty negative that reduces your flexibility.
Stop worrying about grain, resolution, sharpness, and everything else that doesn't have a damn thing to do with substance.