You only got 1 shot kills with slugs at distance if you get a headshot. That's quite hard, I think it's fair (I don't use slugs personally, too difficult for me! Lol!).
Also, any of you guys hipfire consistently?
Hipfire is really good on PC but I've always had problem hipfiring on consoles. It's just not as accurate as hipfiring with a mouse.
Now I almost always aim down sights before shooting but every now and then when I'm in close quarters I'm killed in a fight that I know I could have won if I hipfired...
Actually, I've been training my hipfire... So I can equip my weapon with an optic aim, and use the aim on long distances and hipfire on close quarters. It can result in a powerful combo. With assault is devastating.