Hatcher wrote of a Garand put to the test with specialy assembled loads of 125,000 CUP. Thats far above the cold flow and rupture point of standard cartridge cases, the test cartridges used specially made cases.
The Garand digested a lot of these rounds before any damaged showed, and that was a broken lug on the bolt, not damage to the receiver.
They continued firing with the broken bolt with no mishaps.
There have been custom straightpull rifles built on the Garand receivers and chambered for ungodly hot experimental cartridges. They built some in 60's or earlier, and a few in recent years.