Don't know how fast you can get the bee, or how long the brass will last, but I get 3200 fps out of Nosler Ballistic tip 40 grainers with sub moa accuracy in the 221. I like the K-hornet I have, but LOVE the fireball. If you must have a rimmed case, look into the 224 RC maxi, a 357 maximum case necked to 224 bullets.
regards,
graycg