Before you even shoot the 209 primers off, be sure and swab all the oil out of the barrel that was in there for storage. I put a solution patch on the ramrod and swab the barrel with a damp patch. I then do a second damp patch sometimes even. After that I run two dry patches through the barrel to make sure the barrel is clean, dry, and oil free. While the dry patch is in the breech area, I like to pop a 209 primer. The reason you shoot a couple of primers off before you start your range session is to clean out the breech plug of any oil, dirt, or crud that might have collected in there. Shooting off two or three primers will also put a slight fowling in the breech. Nothing you need worry about.