Someone 15 feet away will cover that distance in about the time you hit him with your 1st round. In the time he is still on his feet and fighting he will cut you to ribbons. So you kill him but he still kills you. I don't call that going home safe.
Again, have you tried the skill you have against someone with training knife and airsoft? I think you may have a AHHHHH moment. Don't be one that stands on the range shots a sheet of paper and says "I can do this or I can do that." Put it to the test in FOF against live human beings and then tell me what you can and can not do. Just Me!