I have been thinking of getting a high velocity 20 caliber round such as 22-250 or 204 Ruger, just because I have not tried any of these type of cartridges. As a reloader, I have worked up 30 caliber rounds, like 300 Savage and 30-06 for my deer rifles and a lot of pistol cartridges, so when components are available, I could reload for them. But what should I consider with 22-250 vs. 204? Or should I go with something else, such as .223. But I do like the idea of shooting something around 4k fps. For a minute I thought about maybe a 17 Hornet, but not really sure about those 17s.