My discussion here deals with accuracy rather than with throw-weight.
With my Glock 19, bullet weight seems to be less of a factor than profile. It seems to deliver the best accuracy with a bullet having a longer bearing surface. Bullets with a more gently-sloping ogive seem to do better than bullets with a more sharply-sloping one. Consequently, the lighter bullets seem to be less accurate because their reduced weight calls for a design providing less bearing surface. One of the bullets this gun likes best is the 130 gr. designed for the .38 Super.
There are often exceptions to rules, and the lighter weight conical bullets are the exception here. This is because even though they are shorter, the abruptly sloping profile increases bearing surface. For example, the (obsolete) 110 gr. Berry jacketed conical bullet (shaped kinda like a SWC) works very well.
One of the worst performers in my Glock is the bulk RP 115 gr. JHP, which has a very long ogive and short bearing surface.
My Star Model B sprays quite indiscriminately regardless of bullet weight.