I was working on some cases tonight to put Hornady XTP 158 grain bullets in Hornady cases. The first thing I thought was odd is the new cases passed the go/no go gauge without sizing. I even started putting them through the sizer die but had almost no resistance. After flaring the cases the bullets seated with the expected resistance. Fast forward to the once fired Hornady cases. After sizing (with some resistance)I flared the cases and test fit the bullet. Pushed right in with my fingers. Almost no resistance. I’m using an older set of carbide Pacific dies. I don’t recall this happening with my other brands of brass. Some of those have been reloaded several times. Any thoughts? I’m stumped.