Harrison actually sells both 22 and 243 Grendel dies(Hornady,which I hate). I've got lotsa Sizers/Seaters and swap alotta thangs around. The Forster 6PPC will get you there,but I prefer an RCBS Comp Seater(with the window)...they cross nicely to a whole slew of chamberings and are a well kept "secret".
Hint.................(grin)