This is what happens when a repair is attempted by someone who isn't up to the job.
I wouldn't bother trying to salvage that handle.
Look at it as an opportunity to install an upgraded handle and optimize primary extraction at the same time.
I have always used paste silver braze. Never had one come off that I installed.
No experience with a TIG welded repair. Don't know where the beads are run. I do know that a proper silver brazed job has a lot of surface area and is very strong.
I was wondering what to do with the 700 long action in the photo. One bolt was standard faced, the other magnum. I forget now which was which. I did set the thing up as a rifle. In the last while I assembled a .25-06 sporter and a .300WinMag with heavy barrel in an HS stock..
Anyway, there a bolt body without a handle, and two replacement handles, one factory, the other extended.
It depends on what is desired. I've used that pattern of extended handle on a precision rifle and it is excellent.
Note that the handle attachment area on the bolt body is smooth, clean and undamaged. That is important for a good job.
