Credit to WhyScotty for spotting these.
AMD Catalyst 13.11 BETA1 (13.200.16.0 September 26)
Build Info:
13.20.16-130926a-163066E-ATI
DriverVer=09/26/2013, 13.200.16.0000
Catalyst: 13.11
CCC: 2013.0926.1629.27759
3D: 9.14.10.01001
OGL: 6.14.10.12458
OCL: 10.0.1311.2
Feature Highlights of The AMD Catalyst 13.11 Beta Driver for Windows
Includes support for the new products:
AMD Radeon™ R9 280X
AMD Radeon R9 270X
AMD Radeon R7 260X
AMD Radeon R7 250
AMD Radeon R7 240
http://www.guru3d.com/files_details/amd_catalyst_13_11_beta1_(13_200_16_september_26)_download.html
No word on if there are any changes from 13.10 Beta 2. The file revisions are all newer than 13.10 beta 2. Early feedback from Guru3D says "Seems to help with stuttering gameplay with crossfire on Battlefield 4.". Don't rule out placebo's just yet though folks.