This isn't a big deal. MtGun was right on the nose. WASH YOUR HANDS after handling WW, casting, reloading, or shooting at an indoor range. Especially do so before you put your big, greasy mitts on a Triple Cheeseburger and a Supersize order of fries.
Did I suggest WASH YOUR HANDS? If you do want to use even a disposable mask when casting as a precaution, make sure it is N100 rated and not N95.
Again, feel free to PM me if you have any questions. My company's website is www.oshahelpnow.com.