DHS agents do, as they are required to go through rigorous range training, where each agent shoot 1587 rounds per day, 6 days a week, for 6 months before qualifying. After qualifying, they are expected to fire 2000 rounds per day, but for only 5 days per week. After 2 years, they are expected to re-qualify.
They may be able to shoot a squirrel at 100 yards, but the shoulder joint, if it is a rifle, or the joints of the hand can experience severe medical problems with an ill-fitting handgun. Some say the recoil of a .40 caliber is worse than a .45 caliber because it is snappier, causing a hard jolt to the hand, or to the shoulder. After shooting 1587 rounds in a day, I could see a DHS agent in real trouble from joint pain.