OK, never reloaded slugs.
I reload mostly steel shot. It can be a real pain. I am currently able to buy shells at $5.50 per box after rebate, so reloading doesn't pay at that rate. I haven't loaded shotshells much for a few years.
Given the price jumps on ammo lately, I think the old stock that I'm buying will run out soon, and I'll be back to rolling my own.
Good luck.