Looks like ol' Joe is in a sweet spot! I used to be in such a pickle myself, long ago. I had so many goddamned guns - that keeping them stocked with ammo was a real PITA! When I stocked up on 45, I ran out of 9mm, when I stocked up on 9mm, I ran out of .45 and .357. It was infuriating!
One of the things that scares the hell out of gunnies, (and shouldn't) - is committing to simplifying your ammo requirements. One day I did a Donald Duck temper tantrum in the gun safe - and emptied out all the safe queens. It wasn't enough. So I decided to narrow it down to one calibre and that's it. I went with the 45 ACP. I can shoot and kill anything I need to with that, and in the real world, all I do is shoot at paper or cans. I got a Dillon progressive press and could stamp out ammo faster than you could even think about it. I always had about 5~8 thousand primers in stock, a couple 4 and 8 lb. kegs of powder... and when Obutthole started selling guns for the Mexicans and the NRA... I was well ahead of the supply crunch that resulted. A couple years ago I lost control of myself in the gunshop and bought one of those sweet little Ruger Redhawks that shoots 45 Colt AND 45 ACP in moon clips. A kind soul taught me how to cast boolits and now....pbbfbfbffbfbffffft! For all intents and purposes... I am ammo self reliant.
It's not a solution for everyone, and I could have gone with 9mm, .357 or some other calibre and done just as well. For me, going with the 45 ACP took brass out of the supply chain - I merely picked up the empties left lying around on the range. I have a three gallon bucket filled with them. 9mm brass is even easier to find... but the 9 likes small, fast bullets... and for cast boolits you usually want to go heavy and slow - with the 45 does with aplomb!
Of course, I shot myself in the ass with all that because all I did was buy more guns in the same calibre! But it's all good. Life on the reloading bench is much simpler now.