Re: Savage action strength.
The .338LM runs maximum pressure 420.00 MPa (60,916 psi) while the .300WM runs maximum pressure 64,000 psi (440 MPa). The Savage actions handle the pressure of the WinMag just fine. You may want to measure the ejection port of a long action and make sure you won't have to single feed the Lapua before you buy one. Also you will want to make sure the outside diameter of the Savage .585" bolt face will fit the inside diameter of the Savage long action. If it were me I would just go ahead and buy a 110FCP-HS already chambered in 338LM, it is a solid top action (think giant LRP action) and much more rigid than the open top LA's and it comes with a decent stock and DBM kit for the money.