Some argue that .223 Rem. is not adequate for deer. They say the bullet is too small and the cartridge lacks power. They also claim it is not legal in most states. Factually speaking, they are wrong on all accounts. With the right bullet, .223 Rem. can drive to 20-plus inches and expand to double diameter. And, in the states that allow rifles for deer hunting, only eight do not permit the use of the .223 Rem. As far as the “right bullet” goes, one of the best .223 Rem. loads for deer is the 62-grain Federal Fusion.