I built a 20 practical and liked it so much I built a second one, I took my 204 ruger barrel off and stuck it in the closet. All the reasons have been listed already, chiefly for me was easy and cheap brass availability. I like 39 and 40 grain bullets out of an 11 twist, it'll basically do anything a 22-250 will on varmints with a lot less powder and recoil.
