I’ll stick with my FAL for .308s - the G3’s a lot more violent when you fire it and to me has a weird balance.
https://www.youtube.com/watch?v=zYtx9g7BmOE
Never fired a FAL, but concur about the G3. Had a HK-91 with polygonal rifling, and that thing astounded me with the harsh recoil. I was used to the M-14, a far more mild recoil impulse.
The AR-10/-LR-308 platform is downright gentle, especially if you have an adjustable gas block to tune it.