Rifle actions round vs flat bottom

A round action will leave more wood in the stock making the stock stronger and a flat bottom will
resist torque better than a round action. No one is going to win or loose a shooting competition
due to the bottom of their action.
 
I'm actually a big fan of the flat bottomed actions. As a matter of fact, now that I think about it, all my rifles are flat bottoms.

I have 5 M70/FN SPR/FN PBR rifles and 3 howa 1500s.

I eventually want to add a seekins hit as well but I have no idea if it's round or flat.
I’m pretty confident the new m3 is flat bottomed. I remember watching the tear down videos and thought it was slick. I’ve got the M3 on my shortlist
 
I'm only familiar with the AI AT action as a flat bottom design. On the AT rifles Accuracy International bonded the action to the chassis as well as screw/bolt it down. The more recent AI model doesn't bond the action to the chassis but it uses 6 screws/bolts to keep it from shifting.