New Federal 124gr 9mm - filthy in the box?

Typically I wouldn’t be as concerned about this but I’ve got a newborn and I’m assuming this is lead… loaded one mag from a new box of Federal American Eagle 9mm and my hands were coated in this (gun powder? Grease?) I’ve dealt with a ton of the same ammo but never seen this. It washed off fine but worried about exposure to my baby. Anyone seen this before?

Typically I wouldn’t be as concerned about this but I’ve got a newborn and I’m assuming this is lead… loaded one mag from a new box of Federal American Eagle 9mm and my hands were coated in this (gun powder? Grease?) I’ve dealt with a ton of the same ammo but never seen this. It washed off fine but worried about exposure to my baby. Anyone seen this before?