Joshua here. Like Higby mentioned, we're going to be buffing both the battle and scout rifles in the next GU.
Battle rifles: The biggest changes will be in the recoil. Vertical recoil will brought down and recoil recovery will be getting a very large speed increase. Basically, you'll be able to put more bullets on the same target at a much faster rate. I'm also looking at the projectile speed and the far range damage (so the weapon isn't penalized so much by nanoweave armor), but those details haven't been completely ironed out yet.
Scout Rifles: The scout rifles will be getting more drastic changes in comparison to the battle rifles. The goal with the update is to make them into more viable medium range weapons, that way you can choose to equip SMGs for short range, scout rifles for medium range, and sniper rifles for long range. This is going to mean damage changes and maybe a ROF change.
A couple of you have said the video capture stops this "stuttering" effect - but does it affect the overall FPS as well?
Thanks for all this info - and a special thanks to those that have provided system information so far. I'll be looking at the video capture side effect here shortly.
Also, as a side note - the average overall FPS stats we track (which are only moderately useful really) helps us catch when there is a wild swing in performance. The only significant average FPS change was the stupid bug two weeks ago - and we're sorry about that.
I have five machines (all desktops - currently), but I can't use them all at one time. The only reason I bring it up is because what this means is there is some configuration of machine that causes this and providing your processor, system RAM size, video card, driver version, and Operating system in your original post can really help us narrow down which systems to focus on.