Yeah...you are wrong about that. I've owned numerous rifles that have more than average recoil - .338 WM's, .375 H&H's, .416 RM and others. My .300 WM Mauser M96 (1996) straight pull weighs less than the T3 Lite and, curiously, I can shoot 220gr Partitions at 2850 FPS just fine with it. Next, both the .300 and .338 were tested with numerous powders - H1000, H4831SC, IMR4350, Ramshot Magnum; and numerous bullets - .300 WM - 180gr TSX, 180gr BT, 180/200gr Partition, 200gr Sierra GK; .338 WM - 185gr TTSX, 225gr Hornady SP and 250gr Partition. The .300 WM would barely squeak under 1" with the best load and the .338 WM would do no better than about 1.25". Most loads were in the 1.5" to 2" range.
It is not just me - look on other forums and you will find that the T3 Lite in heavier recoiling chamberings can have accuracy issues. As I mentioned, these are apparently rectified with the installation of the B&C stock.