Thread: Case lengthening when bump sizing

Originally Posted by charliehorse

So not when the expander is coming back through?

No , but I experienced that when I first started using an ultrasonic cleaner , I was obsessed with clean cases . A lack of neck lubrication was causing the expander to drag through the very clean , dry neck . The sizing was fine once the expander was removed and after refitting and lubricating the inside of the necks the problem was solved .

I now only do the minimum of case cleaning , that's only to keep dirt out of my dies and aid case inspection.

That was about 10 years ago and I'm not afraid to say I'm still learning .