It's not an either/or...there are two classes of those saved. One is the elect, and one is rest.
The elect are those that will serve as kings in priest in God's millenial kingdom. The elect will take part in the first resurrection:
Rev 20:4 And I saw thrones, and they sat on them, and judgment was given to them. And I saw the souls of those who had been beheaded for the witness of Jesus and for the Word of God, and who had not worshiped the beast nor his image, nor had received his mark on their foreheads, nor in their hands. And they lived and reigned with Christ a thousand years.
Rev 20:5 But the rest of the dead did not live again until the thousand years were finished. This is the first resurrection.
Rev 20:6 Blessed and holy is he who has part in the first resurrection. The second death has no authority over these, but they will be priests of God and of Christ, and will reign with Him a thousand years.
The elect are these people. But it's not everyone who will be offered salvation. It's just that the elect get salvation before others.
After the thousand years, there is another resurrection, one in which the non-elect are resurrected and given the opportunity for salvation:
Rev 20:12 And I saw the dead, the small and the great, stand before God. And books were opened, and another book was opened, which is the Book of Life. And the dead were judged out of those things which were written in the books, according to their works.
How does Calvinism interpet this?
Doug...scripture please that any of the non elect will be saved