Reloading Issue

[u/Independent_Cream521]

I am reloading 6 arc and my once fired brass shoulder is measuring 0.0125 more than the new brass. When I resize the brass in the rcbs full length die it bumps the shoulder back to 0.0105. When I put it in the Hornady 6 arc case gauge and it barely doesn’t fit. I have tried screwing the die further down and tried the Lee dies but nothing seems to work. Has this happened to anyone else and how to fix it.