We know KB talked to her mom twice on Thanksgiving morning. If (as mentioned in
@Seattle1 's post you are quoting), she and her mom also spoke in the
evening after the late night cattle checking/ulcer meds activity, that means the late night wasn't Wednesday night into Thursday morning but rather Tuesday night into Wednesday morning?
Whichever night it was, I suspect the target shooting was a part of the same day that became the late night session. I don't think he sent her to check cows by herself, as some have implied. I think they went out there together, though perhaps each driving separately if the cattle activity required two vehicles (ie "you go down the road and count how many are in the meadow while I count in this field"). Earlier in the day, while it was still light, they could have gone target shooting. It does raise the question of whether PF intended for an "accident" to happen then but he chickened out or something else got in his way.
We don't know if he did target shooting too or if it was just her, perhaps refamiliarizing herself with the gun if she hadn't shot it in a long while. If she did the target shooting somewhere like his place, with him overseeing her, to me that suggests she felt safe around him to have him be the one helping her get comfortable with the gun again. IMO
ETA or
@MassGuy 's thought that it was all Weds eve but the sequence was target shooting then phone call to mom then cattle checking then ulcer meds -- that makes sense too, IF the call to mom happened while on the way to the cows rather than from home. Cows were in Westcliffe which IIRC is over an hour away? Meaning a decent chunk of that late night, 2-3 hours worth, was spent just driving there and back. Wouldn't they have started out before dark? Why were they going late in the day at all? Wouldn't one want to count cows/fix fence/whatever they were doing in the daylight?