How Do You Perfectly Sync Audio in Premiere Pro?

How does everyone achieve audio syncing in Premiere Pro? What I tend to do is clap before recording and after and line them up in editing and zoom right in and move the audio track until the claps match. I have noticed though that often they refuse to align by a millisecond or so. How can I get them perfectly aligned or is this something I have to live with or will I end up with audio drift? I have been posting as is even if it isnt a perfect but close enough match.