You could set up one loader to 2 1/2” and the second to 3”. I bought a set of dies for .40 3” for one of my Spolars. I just leave it on that machine as I have two other Spolars set up on the same loading bench. At the current rate my 3” machine might last me several lifetimes. But I hate wasting half an hour changing machine and getting everything ready to load. Being set up I can be loading in under a minute. Load for about 10 minutes and have a hundred shells loaded.