I used to shoot wax bullets in the basement from a Ruger 45colt, at 15 ft accuracy was good if i remember right. The quality of the wax makes a difference, i think i had some left over from canning. I don't remember what size drill i used or what they recommended in the book i got the info from. Just make sure those cases don't get used for regular loads, i cut a small groove with a file on the rim of the case for identification. I later got some plastic bullets that where a little better for accuracy and used the same cases.