JR1957. So the Hot shot and Slix Shot have a different threading than Uberti threading?? Did understand that correctly?Thompson Center made a #11 nipple with a hole in the side for their guns called a Hotshot nipple. When my Walker got into the habit of blowing nipples out of the back of the cylinder I bought 6 of them and rethreaded the holes to accept the Hotshots. This cured the problem. Slick shot nipples are pretty much the same thing.