Most fun? A .22LR conversion on something from the registry. 10/22 with a trigger crank is a hoot as well despite the awkwardness of feeling like you're reeling in a fish.
The price is really getting to me though, a decade ago a brick of thunderbolt was $12 here....now only 325rds is over $50.
I received some "sale" emails recently & the price on 5k bundles is downright blasphemy. Never thought I'd be contemplating reloading .22 of all things, but since prices tend to stay high I'll be doing so in the future.
Not sure why I started saving EVERY spent round I fire after my first purchase, but it turned out to be a good practice.