This is why our recipes sometimes call out certain brands of flour. For example, King Arthur sells an all-purpose flour that has an unusually high protein content verging on bread flour levels.
Heat-processed flour will keep longer than other flours. Keep flour in an airtight container in a cool, dry place. The longer you store it unopened, the better quality bread you can make with it ...
Generally speaking, recipes that call for all-purpose flour are best made with such. If you happen to have leftover bread ...