I've been reading around and whenever someone mentions an "unbeatable" enemy the 1st think I spot is use high DAM/DPS this is fair enough I'd be crazy to suggest a low one and then theres use AP, Hollow point rounds...etc.
This is where I started thinking, I've done plenty of playthroughs, came across all the enemies at different stages and not once have I had to rely on special ammo to topple an enemy. So what makes everyone else want to make the switch to win ?

I personnelly prefer the more traditional approach to difficult fights, if my rifle doesn't do it and their too close run backwards and bring out the melee weapon, if their too strong for melee and getting the upperhand on me I whip out old Annebelle and boom-bada-bing steak on the barbie. ^_^