IMO everything revolves around the primers. We have a local place that frequently has Winchester for $0.069, when I get down to 5k I start making plans to swing by there, last time I snagged 10k.
Powder might cost a lot more, but I have had less trouble finding it, compared to primers.
Blue Bullets never screwed around during the last frenzy, they extended lead times but didn't jack with prices, and I have some loyalty and they are reliable enough that I can wait until I need them to get them on order. Well I am loyal, and the bullet feeder is all set up for them...