As the posts above say, clean it, and lube it with a lube that dries (so as not to migrate to primer area). That is all that is necessary to keep it working without sticking (from dirt, debris from spent primers).
Sometimes you get what you pay for, sometimes you only pay more for what you get.
Three shots are not a "group"...they are a "few".
If the Bible is the literal, infallible, unerring word of God...where are all those witches I am supposed to kill? (Exodus 22:18)