The front Tikka aluminum ring that is supplied by the factory on the T3 Lite model is the only ring that is pinned to the receiver and it will deform under recoil from 7mm RM, 300 WSM
and similar calibers. The steel pin in the front ring that protrudes down into the top of the receiver will deform the back side of the front ring under recoil, and if you examine the back side of the front ring, you'll see the deformation. I observed it on both of my 7mm RMs and on two other 300 WSMs. My brother has seen it on a number of other T3 Lites that have passed through his gun shop.
If you replace the Tikka T3 rings with a stronger set of rings that fastens to the receiver with the four threaded holes in the top of the T3 Lite receiver, and install a Limbsaver recoil pad, then the T3 Lites are ready for battle. Talley rings are light and will get the job done if you're trying to minimize weight. There are a number of other options also, but other bases and rings will likely weigh a bit more than the one-piece Talleys.
Tikka T3 Lites generally shoot ~3/4 moa or better right out of the box with a little testing of loads, either reloads or factory rounds.
They've got an abnormal recoil lug which is installed into the stock rather than onto the barrelled action, so I'm not sure how many aftermarket stocks are available for the T3 Lite model. There was another thread on this Forum that discussed how to modify the recoil lug so the Tikka barrelled action could be bedded to an upgraded stock a while back. A thread search should pull it up.