[Adamantium]

I would use the current load data from websites but reloading technique hasn't changed all that much and neither has a single stage press or dies. If you have old powder and want to use it (I would if the container kept the elements out and didn't rust on the inside) make sure to start from scratch when you buy new stuff, even for the exact same label, because stuff can change over time.

On the issue of slugging you barrel, I say hold off on that. What that means is to take a soft pure lead slug that is oversized and ram it down your barrel with a wooden dowel and hammer then measure its new diameter. It isn't needed unless you shoot lead bullets. And even then I wouldn't bother unless you are getting poor results. Stick with jacketed or plated bullets while you are learning and it is just one less thing to worry about. There are a few other reasons too but those are the basics.