When I last spoke of fitting the Lee measure to the Dillon 450, I was using a wrap of electrical tape to hold it in place. Few days ago was talking to son about this, and he suggested maybe a wide muffler clamp? Hmmm... put some rubber inside, maybe. So down to a nearby auto parts place, where nothing suitable was found.
On the way back I pass a Lowe's, and the thought "Plumbing fitting? Or garden hose?" So in a browse around, which found a dishwasher drain connector: soft rubber, large on one end, small on the other, worth a try.
A little long on the ends, easy to trim. The small end was a little small, used a sharp knife to shave out the inside until it was a tight fit over the knurled piece on the bottom of the measure