Many folks here probably hunted in the rain the last two weeks of the season. As you sat there, barrel pointed skyward raindrops were landing on and travelling down the seam between your barrel and screw in choke. Now is the time to unscrew your choke tube and lube it and the barrel threads. I highly recommend using the silver Permatex Anti Seize. You can buy it at NAPA stores part #765-1151. This is great stuff I use it on all automotive, small engine, and marine projects. Do it now so we will not see the threads every Fall, "My choke tube is stuck"