If I am running them through a suppressor, I try to powder coat after gas checking–to make sure the gas check doesn’t fly off in the suppressor. If I don’t plan on shooting them through a suppressor, I am fine gas checking after powder coating. One thing to note, now that I have the gas check seating die from NOE, it really makes “gas checking after powder coating” much easier. It helps to keep the noses good while putting on those tight gas checks.