Hi
I have 2 x ASR 1002 facing 2 x 7341 (not exactly the same, but...)
I'm using the following and it works well:
wccp router-list 1 10.x.x.1 10.x.x.21
wccp tcp-promiscuous mask src-ip-mask 0x300 dst-ip-mask 0x0
wccp tcp-promiscuous router-list-num 1
wccp version 2
!
egress-method negotiated-return intercept-method wccp
WAAS s/w is 4.3.3
ASR is asr1000rp1-adventerprisek9.03.01.00.S.150-1.S.bin
HTH
Anthony