Once I apply the moly paste to all the metal to metal contact moving parts all wear is eliminated. As I run the action with snap caps to be safe as the moly is burnished into the pores of the metal the friction is reduced. On my revolvers.
On the pistols I disassemble the pistol. I take the empty slide apply moly to the frame and slide rails and run the slide to burnish the moly into the metal pores. I apply moly to all the metal to metal contact parts during reassembly. The barrel n bushing, the recoil spring, hammer face etc. Once it's together I run the slide 25 to 50 times. Wipe off the excess moly and she is good to test first.
On semi auto rifles it's the same process when applying moly. The receiver rails, the bolt and bolt carrier, gas piston, recoil spring, spring guide etc. But I run the bolt carrier 50 to 100 times to work the moly in.
Any gun that has moly in it at first will feel stiff before you run it by hand.
While cycling it to burnish the moly in it should loosen up. If it doesn't you have too much moly in it. It should free up after cycling it by hand.
You gun will cycle smoother, faster, less trigger pull, smoother trigger pull.
You much use a moly paste or moly anti seeze. There is no substitute.
Then using snap caps you can cycle it and dry fire it all you want.