I think there is something going on in the background with precision damage. I consistently have issues with outlaw procing on my redrix. I can tell I got a precision kill as it does the animation on the enemy I killed (such as cabal helmets poping off) yet outlaw won't register the precision kill. Or I will start a reload expecting it to be quick as outlaw should have been activated, but there will be a delay and outlaw will show up on the left of my screen halfway through the reload animation. Thankfully desperado will still kick in after the reload, I just have to suffer through that slow reload animation. I have also found there to be times (mostly when I'm using hand canons) that I will kill an enemy with a precision kill (again based on the precision kill animation of the enemy) but the damage numbers that pop up are not displayed as a Crit and it will just show as normal damage.