Here's what I know because I measured it: buy some standard 158 grain .38 ammo and check the POI. Shoot 130 grain standard .38 load (same FPS) and it will hit lower than the 158. It will also have significantly less recoil.

Then get some 130 grain +p defense loads and you will find they hit the same POI as the 158 standard .38 even though they are lighter weight and accelerate faster. They are loaded hotter to achieve a higher muzzle velocity. They also have more recoil because of it. The increased recoil flips the muzzle up faster. Buy some magnums of the same bullet weight and they hit a higher POI. They are even hotter load (higher FPS), with even more recoil. Recoil is the first order effect and the more powder you load in, the more recoil you will get.