Saved believers are never referred to as sinners. Believers are only referred to as sinners when they were are being justifed. Otherwise, they are always referred to as saints, sons of God, the Elect, and other positive names, etc.. A justified believer is never referred to with a negative name like a "sinner."
Paul says, "Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind, [FONT=Arial, Helvetica, sans-serif] [/FONT]Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God."
Now, this is where it gets really interesting in the passage. Paul says,
"And such were some of you: but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the Spirit of our God."
In other words, believers WERE sinners. They WERE once fornicators, adulters, drunkards, etc. But they are not that way anymore.