What you are reading about is folks trying to get every last drop of accuracy out of a platform that does not lend itself to precision shooting. They do many things to reduce group size. And some of them have barrels that are slightly out of specification. What you need to do depends on what fit up your gun has, and how accurate you need it to be. You may not need to do anything special.
I have a TC Contender that I have been loading for since the 90's. And 3 barrels for my Encore Pro Hunter. I load them the same as for my bolt rifles. I get close to MOA out of some barrels. And I get over MOA by a lot in others. But they serve the purpose that I need them to. The barrel that shoots the worst shoots between 1 1/2" and 3" at 100 yards, depending upon the load. I use it for hunting in an area with timber and small clear cuts. My longest shot is only going to be 150 yards, so I don't sweat the group size. It's minute of deer.
Unless you plan to shoot in competition, you may not need to do anything fancy. How you load the ammo may not make much of a difference at first. More important is being consistent with how you hold the gun. The fore stock is attached directly to the barrel. Pressure changes against the fore stock change the POI accordingly. After you see how it shoots, then you will know if you need to try anything to tighten it up. Never know til you give it a whirl
. And if you like it....your husband might need another action for his barrels