I have a Handi I bought in 500 S&W magnum to play with some years ago. That cartridge was pressure rated at 65k psi and a larger diameter than the 458 belted magnums. This requires a lot of strength from these actions. I occasionally read about the "twelve gauge from hell" which seems to take advantage of this quality. Also if one is using rimmed brass there seems to be limitted if any chance of brass failure. Therefore, the RIFLE Handi actions have been used and tested in applications requiring very high strength. I am looking for commentary on this.