RE: $300 budget to get started in reloading, Help?
I would get a Lee turret press, RCBS balance beam scale, tumbler, Lee case trimmer, Lee or RCBS primer tool, etc. That way you can leave the dies, once adjusted, in the turret and simply buy more turrets. You'll have 1 turret for each caliber you load for, and when changing calibers, swap turret and shell holder and you're done.