Well, I say that because you might find the gun you love, and the ammo you want to shoot, and your particular rifle might hate the combo. And then you spend days at the range and thousands of dollars on factory ammo trying to fight a losing battle.
This is why handloading pays for itself over time...Not necessarily in monetary form, but in eliminating major headaches and lots of money wasted on factory ammo. It allows you to custom tailor your ammo to your specific rifle and achieve the results you want much easier, cheaper, and faster than going the factory ammo route.
Mud is 1,000 percent correct. It is actually very difficult to use "long range" and "factory ammo" in the same sentence. OMG, I just did it!