While I have no problem with Black Hills ammo, I think your idea to just "go grab a box" of whatever ammo for your SD pistol is flawed.
Maybe 5 boxes, shoot 4 in practice and function testing, and keep the 5th for SD.
Maybe I'm odd, but I've never bought one box of any type of ammo since I was 15 years old and only had the $$ for that one box. Back in the old days, we could buy shotgun shells one at a time from open boxes behind the counter cause there were a LOT of folks who couldn't afford a full box.