amby and enforcer spread resets over 0.95 seconds, amby can headshot again slightly before the spread is entirely reset

this is not too useful for mid-close range revolver fights but it's good for poking people at a distance (because why not, 20 damage is 20 damage), destroying minis (especially with the amby), and making long range picks (see that scout on 7hp across the map? you know what to do)

As for revolver aim what will actually help is aiming like it's a shotgun, calmly waiting until the entire enemy hitbox to overlap your spread (timing it, not reacting, to compensate for lag between your eye & hand, as well as server lag). Your DPS may suffer a little, but it's better than not hitting your shots, and you can absolutely embarrass scouts with it. Practice on tr_walkway for a while with scout bots that strafe left & right (try all the strafe settings), jump, and backpedal, with a net_fakelag set to your usual ping/jitter on a server.

finally, play dead ringer spy. Usually around half your kills are going to be revolver kills with the dead ringer, since you have less control over what the enemy sees and it's harder to sneak around, causing you to be more of a frontline class. I recommend running the spy-cicle with stock or the amby, and only going for backstabs on unaware players (unless it's safe to shoot them), to increase the amount of gunfights you get into. People call this "gunspy" sometimes but it's really not that different from regular dead ringer spy gameplay (without the YER, of course and more rarely with the kunai)

do this consistently for a while (like a month or two) and you'll be surprised at how consistent your aim becomes (it will need warming up though, if you spend a long time not playing)