Since when does quantity = lethality? 450 rounds is nothing. A reloader may do that many in a single sitting. I personally reload about 10x more ammo then I shoot because I enjoy reloading as much, if not slightly more than shooting. As a result I guess I have a “stockpile.”
There is no law limiting the amount of ammo or firearms a person may own.
I reload as well. Typically, I like to use a full tray of 100 primers at a time. That's what fits in the tube of the Dillon 550. It amounts to two boxes of 50 rounds. 5 trays consumes a bulk box of 500 bullets. No big deal on a progressive building .38SPL. It's a lot more work to use a single stage to load .50 cal. Especially 450 in a sitting.
I enjoy reloading as much
You are a very odd duck