Quick approximation... 1 millirad at 1000 meters gives you a one meter wide beam. 1.4 would be just less then a meter and a half wide.
Your eye cant tell the difference, and the above assumes perfect lab grade lasers, which you will not be buying. Your beams will be oblong and fuzzy with bright spots due to diode physics at 1000 meters, not a clean circle like a classical gas laser would be.
Steve
Qui habet Christos, habet Vitam!
I should have rented the space under my name for advertising.
When I still could have...