I'm sorry, but I thought I told you that I believed in predestination.
John 10:27-30
My take on this is that God's people will know God's voice. They will seek out God. Does this mean predestination? Perhaps, perhaps not.
There there's the nobody can snatch them out of my hands. Does this mean once saved always saved? No. It just means that those who are God's people are God's people. Could it mean predestination? Yes. Does it mean that there must be predestination for all? No. It just means what it says. You can take it and run with it if you like, but be careful.
Romans 8:31-39
Does God love those who reject Him? It seems to me that if the answer is yes that you must believe in universal salvation.
Other than that, I'd say that this is talking about the elect and no where in the Bible does it say that the elect know who they are while they are alive. Even Paul does not judge that he must be a part of the elect. He is confident, but he does not deem himself to be judge. See 1 Corinthians 4:1-5.
John 6:65
I'd say that this is a possible predestination verse, but it doesn't need to be. It is possible that there are those who were given the chance that did not come to Jesus.
If I were to say to you that in order to buy a Coke you must have a dollar, does that mean that only the people who buy Cokes have a dollar? No, but it does mean that the people who have Cokes had a dollar. There may be people with a dollar who don't like Coke.
1 Corinthians 5:5
I found it surprising that you'd bring up 1 Corinthians 5 because that is a verse that has to do with what you'd call losing salvation. Go back and read 1 Corinthians 5 again and you will see that Paul was in fear that this person might not be found righteous on the day of the Lord.(This is when we are judged, not one day earlier)
1 Timothy 1:20
Once again, someone needed to reprimanded so that they will repent and be found righteous. If they were to continue in rebellion, they would not be found righteous on the day of the Lord.
Did I miss any?