Interesting, I have built countless Axis from .17, 22 BR, 7mm... well anything odd that I can get a barrel for a reasonable price. The actions are excellent, tools are cheap, other savage barrels fit with ease both factory and aftermarket. That's why they are the best gun on the market. That said I have more fun and find more accuracy from a used donor Axis action, a couple of Boyds stocks in both long and short action, covers them all, and and change them back and forth, headspace and of course decent quality barrels are key. So the SAMI specs show around 60,200 psi for the 30-06 and 61,000 for the 338. That scares me, of course that's max everything. Also without a proper brake recoil would fold up the factory Axis stock..... The brass will pass through the ejection port..... I checked. I do know when I send a 285 grain Hornady close to max charge, you know it. A sh-t ton of energy is spent! Although peeking my curiosity, when you lay both guns out side by side it becomes clear, Lapua is bigger, more robust in every way! I say no go. I could see the bolt lug lands failing, catastrophic failure and personal injury. Buy the gun in 338 factory built. Don't build it. Why take the chance...