Thread: 577/450 case sizing

Hi all. I've got a 577/450 Martini Henry that I've never shot. Struggling with resizing magtech 28g shotshell brass without crushing them. Should've stuck with just the Snider but it seemed like a good idea to get another example of a rifle in the same parent case.
I was talking to Phil Moore about this at a shoot a year ago, apparently he's making forming dies. Anyone know how to get hold of him?
Thanks