Re: Moly coated bullets
Moly is simply a dry lube. It reduces friction, which reduces pressure, which reduces velocity. It also reduces copper fouling (the primary benefit in my opinion).
It will allow you to increase your powder charge and get a bit more velocity at equal pressure. It reduces copper fouling to the point you can literally shoot hundreds of rounds between cleanings.
If you use it, the idea is to leave it in the bore. It's counterproductive to try to clean it out after shooting.
Some folks bitch about getting their fingers dirty when using it, so if that is an issue for you, you might not like it.
Shooters who use top-shelf barrels claim little to no copper fouling anyway, so your mileage may vary.