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I have one... there are some things to learn about them. For instance, the 8mm Mauser round beat up the G43 action really good and resulted in cracking of the rear of the receiver from the constant pounding it was taking. There's an update you can have done to the action to reduce the recoil and prevent the destruction of the receiver. I'd start my research there as there's more info about it on the interweb than I can type here
Is this what you are referring to?
www.youtube.com/watch?v=N5wL3ALiRZk
If you are going to shoot these, have a shooters kit installed to reduce the gas pressure. Once that is done they are totally fine to shoot. It was designed with higher gas to cycle on the Eastern Front cold conditions. It will fling the brass over 30 feet. With the shooters kit in it, it will reduce the brass fling down to 5 to 10 feet. I have no worried about shooting any of mine and they are as accurate as anything.