I am casting .403 bullets from a NOE mold, they're great. I ordered from NOE gas checks which are .410. They fit the base of the bullets well, but since I'm sizing down to .401 it takes a lot of effort to get the bullet through the sizer. Without the gas check they slide through pretty easily. I believe the copper checks are .030 . Am I using the right gas check?
Interests include Fly Fishing, Archery, Shooting and many more. British Military Veteran.