No. The round nose is more aerodynamically shaped than a flat nose, so it loses velocity to air drag more slowly once it is out of the muzzle. But inside the barrel, it is just an accelerating mass that responds to the accelerating force of the pressure behind it without regard to its shape. This is why, in theory, same weight bullets should all work with the same powder charges.
In practice, however, not all bullets have the same jacket thickness or hardness, affecting how much start pressure is needed to get them swaged into the rifling. They aren't all the same density or shape, so the amount of room they take away from the powder space under them differs, also affecting pressure. So while the theory says they should use the same charge, the reality is that changing bullets (or primers, or cases, or even powder lot numbers sometimes) can alter pressure enough that you always want to go down to the starting loads listed and work up slowly, watching for signs of pressure.