From personal experience, I’ve gotten my best results by keeping my presses within about the middle 3/5 of the ROM.
Insofar as hypertrophy goes, most muscles tend to like constant tension - particularly shoulders.
Larry Scott figured that out, which is when he started adding his own bits of finesse to db presses and got phenomenal results.
With most movements, the tension on the targeted muscles has a “vanishing point” - a point at which some or all resistance leaves the muscle; often because it is transferred to joints, ancillary muscles, or gravity.
There is benefit to be had by limiting your ROM to the hardest portion of the movement.
Traditionally, partial rep training has been frowned upon, but if done properly, can be quite effective & beneficial for building size.
