I can walk into Williams gun sight company Davison Michigan and buy all the IMR 4350, IMR 30-31, IMR 4064 and many other IMR powders as well as many other brands of smoke less, Triple 7, Several different prodex black powder subs.
I have no problems with any primers but have to limit what I buy with their limit of how much I can buy at a time so every one has a chance to get some.
I did find a shortage of #11 caps in CCI mag brand during Ml season this year.
Bullets are on hand of most popular brands and sizes. I have to ask them to get me some Sierra 6mm 85gr.HPBT as it isn't one stocked these days.
Al