I don't understand why a rifle designer would ever want to place the entire action until the full load of recoil. Doesn't surprise me too much that the rifle won't drive tacks as is.
Let me start off by saying I'm not picking on anyone. The above quote follows standard bolt gun doctrine pretty much to the letter.
We'll just call this a "high minded" discussion.
Take a piece of steel and compare it to wood, fiberglass, or aluminum. Using nothing more than the good common sense we are born with it's not hard to pick the one that is going to be strongest and most resilient to impact and compression loading.
The average rifle stock is just under 2 inches in width where the receiver sits. A typical magazine box is around an inch in width. This means that when a repeating rifle with a floor metal is assembled and in service it has two sides that are roughly just under half an inch in thickness. As we go up in caliber size, this dimension will decrease some due to the bigger mag box.
Traditional bolt guns have the recoil lug up front. This means that the two half inch slabs are seeing the brunt of the impact, torsional, and tensile loading delivered by the barreled action during the firing event and then transmitting that energy through the grip, the butt, and eventually to your shoulder in the form of recoil. On big calibers it's a common practice to cross pin a stock. This is done to mitigate the stock splitting in two halves behind the recoil lug and its a common practice on dangerous game rifles chambered in a boomer class calibers.
The reason is the sides of the stock bow out during recoil. Place your hands against one another as if your in prayer, now bend your fingers while keeping the palms and fingertips in contact. This is exactly what a stock does during recoil.
Using that thought process what is so terrible about the action bypassing all that drama and using the tang instead?
I own a rifle done just this way and it's the hardest hitting gun I own. It's in a lighter caliber (22-250) so it'd be really speculative for me to say that bigger cartridges don't change the rules a bit, but it is at least encouraging. It too is a flat bottom action.
I think that so long as the tang area is big enough to not break the tang portion of the grip off the gun a rifle built this way will work just fine and may even be a bit better. It's a theory at this point so don't fillet me too bad.