Yeah, it’s pretty easy to tell that you haven’t been around guns much. 50 rounds isn’t much and isn’t reasonable for any purpose from hobby to sport usage or even proficiency for someone who uses them professionally. The amount of ammo I shoot on any given range trip? Varies from 20 to hundreds and hundreds of rounds; it depends on the day, weather and dozens of other factors. Even the concept of only being able to buy a single box the day of is hugely problematic. For the most common calibers like 9mm prices over the past decade have varied from less than $ .30 a round to over $2.00 per round, if you could even get it. There have been periods of months to years where getting a single box every 3 months was difficult/near impossible. I have one rifle that is a family heirloom that I haven’t found ammunition in stock for over a decade and have never shot it since inheriting it.

The ammunition market is 100 times more volatile than a cardboard box soaked in gasoline holding 100lbs of gunpowder. Having a few thousand rounds doesn’t mean you’re planning anything bad, it’s a drop in the bycket to sustain occasional shooting for 6 months despite never ending supply issues that have been going on for years. If I see ammo at a fair price I buy as much of it as I can. On any given day I might be able to shoot half of the guns I own if I so desire due to the availability of ammo, and that includes the stuff I make on my own in my garage.