I use my rock chucker press for small sizing and a bullet swaging press for the harder to form deals such as hardened bullets or swage forming a jacketed bullet. The real difference between the 2 is the swager has a bit more beef to the linkage as well as a longer handle for much more pressure. You, with your ingenuity, could easily rig up a sizing die in place of say your seating die on your reloading press. (I think you have a reloading press)