These 9mm reloading bullets feature a .356, 147 grain round nose full metal plated jacket. They will not foul your barrel with lead residue. All 147 grain 9mm bullets for reloading are swaged from a custom alloyed lead for uniformity, then plated to final weight and put back in a carbide die to be re-struck to the preferred dimension. These are one of cheapest bullets for the 9mm reloader when reloading 9mm ammo. If you are planning on doing 9mm bullet reloading, you should definitely look at these as one of your best options.