If this is going to be your first time reloading. Don't use it.
other then that measure everything every 5 to 10 shots.
I found mine for my 12 seems to get bumped out of line and this give me light/heavy loads. I fixed it with a small cut out of cardboard and so far so good.
It takes some time to get use to and do NOT reload low cut cheap target loads. (Box of 100 for 20$ at wal-mart) they get stuck even if they are brass.