thats what i do, i bring them down till they touch my chest and contract them at the way to the top. i dont squeez or anything.
but i think thats kinda the point, for my last rep i do a nice negative for as long as i can.. works out nice
i think the important part of the movement is bringing them down as far as you can amd getting that stretch at the bottom of the movement... it seems to have helped me tremendously
Touching the DBs at the top of a mil. press is meaningless in and of itself. It's neither good nor bad. The reason I do it is because I know that if I can touch them together, I'm getting a full extension. In other words, it's almost impossible to touch them untill your arms are nice and high.
Its a double edge sword here, If you touch them at the top it is a rsst period and takes tension off of the majority of the working muscles, however at the top of the movement is where you work the inside of the pecs. If you are aiming for definition and even bulking your inner pecs than i would touch them at the top and even put a squeeze in.