Arizona Killings 2011 Jan

I read in the paper today that the ammunition for the Glock handgun used to kill 6 people and wound Congresswoman Gabby Gifford was purchased in a Walmart store in Tucson. The article also notes that the gunman had a choice of bullets to buy. The ones he used were "full metal jacket range rounds" but he could have paid more and gotten the "self-defense rounds that mushroom upon impact". I ask myself the following questions. Why does a store that sells toys, food and other home goods also sell bullets? Why can't that type of sale be restricted to a gun shop? Where would the violation of the 2nd Amendment occur in that case? Secondly, I ask why someone has any need at all for a bullet that "mushrooms" on impact causing a greater likelyhood of death. Why would the NRA protect such a weapon?