No. The way strings work, there is always a small piece at either end that isn't vibrating properly, so the intonated scale length will always be slightly longer than the nominal (2 x nut to crown of 12th fret distance) scale length. The thicket the string, the longer this length is (which is why the lower string saddles almost always sit further back than the top strings). I'd leave 2-3mm of possible forward travel available, but no more. Move the saddles back to 50% of intonation screw length and you'll find that the intonation springs get compressed completely on the lower strings. Even with the saddles set forwards, you may still find that the low E and A saddle springs may have to be cut down slightly to allow sufficient rear movement.