I pack an extra, precisely because I am not a beginner. I shoot mostly old doubles, they may have been built right for a lifetime of service, but that was 100 years ago, in some cases maybe a lot more. Age and metal are not on friendly terms, so just like me and age, things tend to breakdown and deteriorate. In my youth when shooting 1100 LT's I carried spare O rings, extra barrels, ( before choke tubes), and even a spare trigger group. I changed barrels depending on conditions for choke selection, fortunately never needed any of the other spares. Never felt stupid for having them, or had regret over carrying the "extras" along.