You are dealing with the laws of physics here. F equals MA. The bullet mass times its acceleration is equal to a force. The pistol mass times its acceleration to the rear is equal to this same force because of another law: for every action there is an equal but opposite reaction. You want lighter recoil? Shoot lighter bullets at modest velocities. For factory ammo try the Federal 185 grain Target ammo, or the same in Winchester. This is commonly known as wadcutter ammo because the bullet shape cuts a nice clean hole in the target, making scoring easier. Stay away from 230 grain service pistol ammo, and 185 grain JHP high velocity ammo. The same lower level of recoil can be achieved with reloads of light charges (like 3.5 grains of Bullseye) and 185 grain lead bullets.
Another way of reducing recoil is to make the pistol heavier. Before red dot scopes, it was common to see Bomar ribs added to the top of the .45 pistol slide. This added mass to the pistol, therefore the acceleration to the rear was less. For Service Pistol competition where the 230 grain ammo was mandated, I would add an ounce of lead inside the bottom of my magazine to make the pistol heavier. At one time there was a company selling brass and steel plates to go under the grips that would add mass to the pistol. I think I still have a set of these.
Correctly holding the pistol also reduces the recoil. Your hand wrapping around the grip adds mass to the pistol. A firm wrist adds the mass of the forearm. (A loose wrist decouples this added mass, and can hurt your wrist as the pistol flips up in recoil.) A straight elbow adds the mass of the upper arm and shoulder. Watch someone shooting and see the difference. Firmly held, and with a firm wrist and straight elbow, the pistol and arm rises about three inches in recoil. A loose wrist and the pistol violently twists up to a 45 degree angle!
Changing springs does not change the laws of physics, but can help in the perceived recoil.
The 185 grain ammunition is shorter in overall length, and is of a different shape than the 230 grain ammo. It may take some tinkering to get your pistol to shoot it reliably. One thing is the magazine. The feed lips may have to be adjusted for wadcutter ammo. Easier is to just buy some Metalform magazines. Another possible change is the throating on the barrel, but now days, most barrels already come fully throated.
Light target ammo will not beat your arm and elbow, and you can shoot as long as you have the energy to hold the pistol up.