Stupid question. What is "soft setting" a target?

[LRRPF52]

28" krieger varmatch 1-8 order submitted. will update this in about a year or so whenever it actually arrives. the advantage of gain twist (as I understand) is a pressure thing which leads to velocity. standard twist rate for me, I am not at the level to realize the benefits of gain twist etc. Ill figure out if my cleaning rod is long enough when I get to that point.

Edit

Looks like the wait might be shorter and free fluting

Make sure it gets a +2” Extended Length Gas System, not standard Rifle Length Gas System.