It is a little labor-intensive and time-consuming. 20 soft points in a given caliber take about 90-120 minutes' work. The nice thing is that 20 rounds is several game-seasons'-worth of hunting ammo, esp. in states like mine where "One deer per year" is the rubric.
I have proven to my satisfaction that the SPs target identically downrange to homogenous-alloy castings of the same design launched by identical powder charges. Practice and sight-in ammo is therefor a LOT easier to assemble, and you can stay sharp year-round at nominal cost compared to using factory ammo or jacketed reloads. The down-side for me as a Californian is that I have only one remaining season of deer hunting in which I can use lead bullets in my local Zone. Perhaps by the time lead bullets are outlawed, I will have emigrated to the United States--since CA seems bound & determined upon Secession V.2.0.