Its a common missconception that remington actions are stronger than Savages because of the Locking nut thats used to hold the barel on and the two piece on the Savage when truefuly the Savage reciever is a stronger desgine bacause the barrel threads ar 20 TPI rather than 16 like the Rem so the threads are not as deep as the Remington so their is actualy more metal in this area. Now the bolt head is a two piece desgine and if you talk to anybody thats ever cut on one they will tell you they are typicaly harder than the Remington's and some test have been done where the Savage bolt outlasted the Remington when the lugs were subjected to high pressure.
you can just as easly blow up and action with a 223 as you can with a 338 Lapua , don't believe me fill a 223 case with Hodgdon Universal pistol powder and top it off with a 80gr bullet ,I guarntee it will be more than the rifle can stand and I highly doubt that you'll be able to tell the differance in that and a 338 Lapua loaded on the hot side causeing the weapon to fail.