Ask any medical professional, the shoulders are not designed to bear weight in the behind the neck position. You may be lucky and get away with it, but its not worth the risk to me
I've done heavy dumbell press, up to the 115lb'ers, and heavy military press to the front, up to 255lbs for 5x5. For me, by far the best results were with military press. I can handle much more weight that way, and have gotten much more growth