"in general" a heavy bullet and a fast powder will produce a low velocity low recoil load while still producing a high enough pressure to allow for good combustion of the powder (at least 8-10,000 psi). If the pressure is much below that, the burn will be inconsistent with unburned flakes, inconsistent velocities, sooty cases and lots of smoke. With that as a starting point, if you use a lighter weight bullet, you will need to increase the powder charge to get the same pressure. This will bring the velocity up and consequently the recoil.
If you are looking for a low recoil load to punch paper, that's one thing. If you are trying to make a defensive round or a hunting round, there is no free lunch, the "hitting power" of a light fast bullet vs. a heavier slower bullet will not differ much and getting to that same combination with a fast vs. slow powder will matter even less.
That's "in general". For specifics, you'll need to provide more information.