Adjust or shim the lathe’s tailstock-end feet a little bit ... This machine can be trusted not to cut tapers within at least 6″ or so. How close you want to get these measurements is up ...
Ask anybody whose spent time standing in front of a mill or lathe and they’ll tell you that some operations can get tedious. When you need to turn down a stainless rod by 1/4″ in 0.030 ...