I would neck size if possible but I have decapped live primers with no issues but only a few dozen. In fact I reloaded the same primers just to see what adverse effects if any there would be.... No change shot great.
I would use the die with decapping pin. I have done this before. You keep the primer and the case sized to it correct size.When that happens to me, I choose #2
I want make a correction to this statement. I use the die with the decapping removed to save the good primer in the casing.I would use the die with decapping pin. I have done this before. You keep the primer and the case sized to it correct size.