I liked Bullseye a lot too and it's what got me to get a spearhead account :P
However, zoomed reload? It doesn't seem to do anything, I've never been able to keep reload and zoom on at the same time, it seems to have no effect whatsoever.
I also for the love of all that's Saucy can't get 5 stars on breach expert and go! go! go! expert, the others were piss easy compared to these 2.
I've had multiple "perfect" runs on breach, but the score needed is ridicolous, there seems to be extra chaining needed, which means SLOWING down the speed at which you shoot down targets, because otherwise they take too long to shoot before the chain bonus dissapears...
Sometimes you also get a poor random matchup where you can't chain enough anyway? Why? Where is that? Well, the time the room re-adjusts, sometimes you get 4 hostages popping up first and then the enemies, if this is the first random situtation, then you have 2 other "situations" to follow that can be chained together for a better score. However, sometimes you get one of the other two first, after which you can't chain with the "4 hostages first situation" because it will ALWAYS take too long for the enemies to pop up.
And Go! Go! Go! Expert... well it seems to require god like skills, cause even with some pretty darn good runs, I still can't manage, seems to require an absolute lucky streak where you don't mess up, I've been trying both of these for HOURS literally, I can 5 star everything easily, but these 2... they're a massive jump up from the other expert challenges...
Regardless, the gun handling, sounds, etc, all are great like others said, you really nailed that :P