Thanks everyone, just what I wanted to know. Just a theoretical question but what if you had a machine shop make a op-rod out of a block of billet steal. Improving it so it wouldn't have the "weak" uncut point. Plus billet is very strong(assuming the correct grade of steal was used). Would it then be strong enough to shoot factory ammo or using slower burning powder? I only ask because I know the receiver is very strong and the barrel is proofed to either 75000psi or 100000psi I can't remember which but in either case the rifle itself would be more than capable to shoot full power loads.
*Notice* I would not alter my rifle to do this even if it was possible, I'm just interested in engineering etc.