You might try loading a box with unsized, hand lubricated bullets. If that solves the problem, you need a bullet sizing die one or two thousandths larger.
If that doesn't solve the problem I'd have a smith check my barrel.
I didn't fight to defend your freedom so you could vote to take away mine.
"A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself.
John Stuart Mill."