Originally Posted by G315T
Actually, you can reload and still get the no-miss-whole-clip challenges. I've gotten "Perfectionist" 3 or 4 times now, and I'm 200% certain that one of the times I had shot two, reloaded, shot two, reloaded, and it still unlocked. So, it actually keeps track of the max size of the magazine of your primary weapon... and tracks if you hit that many shots in a row with it.
I'm pretty sure this true, I got this title today and what I did was fire one bullet with the Intervention, then reloaded because I wasn't trying to get it, then I fired 4 more bullets and got the challenge complete even though I had only shot 4 out of the 5 in the clip.