"My question to y'all is this: If I pull the remainder of the rounds with the collet puller, dump the powder and start over, are the primed cases ready for powder and a new bullet?"
Yes, as long as the gas checks aren't pulled off. If you're using Hornady checks that crimp on they should stay with the bullets. Lyman checks may or may not pull off. (Unless they changed Lyman checks - does Hornady make the Lyman checks these days?) You would need to flare the case necks again if you crimped the bullets in place.
You can resize the case necks or not. Optimally that's the way to go but if you want to skip that step it's not vital. The next bullets will seat a tad easier indicating a bit less bullet pull but if it makes you uncomfortable for actual hunting you can always use them for practice rounds. I've reseated bullets into "pulled" cases without resizing the neck and couldn't see where it threw those bullets to a different POI.
If you use them for practice you wouldn't even need to remelt the pulled bullets. A collet puller doesn't damage bullets too much. I've never used powder coated bullets so I don't know how dropping that powder coat into a clean batch of melt would affect things.
