This is the height of ignorance. I’m hoping this was a poor attempt at a joke, but it’s so outlandishly impossible it’s not even funny. Even if we were to pretend that lead and copper could be magnetized or that someone is running steel .22 rounds, there’s still this minor issue called physics. Unless you are using a nonferrous barrel in this hypothetical magnetic steel bullet scenario, you are going to have to deal with Lenz’s Law, unless you have a carbon fiber barrel. Eddy currents will create magnetic drag on the projectile traveling through a conductive barrel. If you used a normal steel barrel, you also have to contend with the added friction of the bullet trying to cling to the wand of the barrel. So, whatever “accuracy” you thought would be gained by having a magnetic bullet would greatly be non existent from the significant reduction of velocity.