Here's something I always wanted to know but never dared ask. Do the accuracy and rate of fire bonuses that come with HM do anything for the javelin and similar weapons? Accuracy is a measure of the spread of pellets and doesn't apply to single rounds, right? And fire rate with javelin is determined/dominated by reload. Does the fire rate bonus make reloading faster? (Let's assume for argument's sake that reload can't be canceled.) I could swear I've seen someone from here take the other two evos in HM - power recharge and power damage - for a javelin GI, and it made me think about these things. Would power recharge bonus mean something for re-cloaking?
Rate of fire does speed up reload time since you must wait one fire cycle to start reloading on any weapon, including the single shot. So if you shorten the time between shots, you can reduce the total reload time. This effect is why nerfing Krysae rate of fire so much made the reload seem awkward, and is also a source of complaint with the Wraith.
Accuracy is also not usually an issue with the sniper rifles. Every shot will be subject to the appropriate aim error though, it is just that this is pretty small or 0 for the sniper rifles anyway. It might help unzoomed shots a bit.
I have had both accuracy and ROF on all GI sniper solos I have ever done since I don't switch around my build.