"This "calculated to cause" language allows us to use Boat Tail Hollow Point bullets for sniper rifles."
But those aren't really hollowpoints.
They're generally called open points, and are NOT designed to expand upon hitting a target.
They have the open nose because the jacket is drawn from the base to the nose and the base is solid (unlike standard military ball ammo, where the nose is solid and base generally has exposed lead).
By having a solid base, it allows the base to be pretty much ballistically perfect, giving levels of accuracy that generally can't be achieved with standard open-base FMJ ammo.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.