I have been dealing with this down in South Carolina. I have been pushed to the point of getting to my local outdoor store in the morning and asking if they have any ammo in. Some days I get it, other times they are dry for days. Either way, I can only get one box per customer so I'm not getting big loads. More just box of 50 5.56 or a box of 9mm. I think that what is important now is to prioritize your calibers. Some people like to run the NATO route, 5.56, 9mm, 7.62x51 and 45. This can help you dial down purchases and what weapons to train with. The hope with NATO being that in normal times, America makes and shelves these more readily. There is an argument for Russian or a different construct. Its up to what weapons you use the most right now. There were 80 million new gun owners last year. People are fear purchasing anything they can get. Hopefully you have enough for your property and family protection. Training for me has dropped down to alot of dry-fire drills, misfire and malfunction drills like I did in the Marines before the rifle range. You can get cool items for in house dry fire relatively cheep. Snap caps and bore laser set ups with a dot on your wall work if you need a visual training a new shooter or are trying something new for yourself. This at least gets you to a point where if you have to push rounds down range you maximize every round and its value add to your comfort with your plat forms

I bought a Glock 27 40 cal, dropped in a new spring and barrel to convert it to a 9mm like a 26 and run Glock 19 mags. I like it as a carry gun and for about 170 bucks I got two guns out of it. I did not change my extractor though, I know that this can cause some early issues with it, saving me some money. After dropping a cheep ghost trigger into it and new sights its a gun that is very rugged and versatile. And if anything happens I dont loose a sig. I try to keep carry guns simple.