Well, I don't know if this qualifies, but here is one of my personal weapons.
I carry only Winchester Ranger, alternating HP and Ball in the winter, but 80% HP in the summer months (PNW living).
At the range I shoot anything from PMC to Winchester White Box to Black Hills to my own reloads. If I can find a deal, that is what I shoot.
I am comfortable with the weapon and I know what it can do, so I don't worry about the little intricacies like powder and equal grain count per round.
A good cleaning afterwards negates the dirty powder argument, and since I don't shoot steel case or Russian, I don't have to worry about chamber damage.