Freebore is not jump, depending on the weight of the mono you plan to shoot you could use the freebore up pretty easy. Monos are longer than traditional bullets and you don't want to lose case capacity by seating them down in the case. Load up some dummy rounds and have the smith chamber to your dummy rounds. Most prefit makers have no issue with this.
Or if you have done it buy a Uni Throater and do it yourself. I only trashed one $1000 barrel but you live and learn.
