I helped someone better with metal working than myself straighten the bolt on my Erfurt 1899 and was very pleased with the results. It looks like its been messed with and bends slightly forward but is still a great improvement. However the numbers and proofs were unaffected by the bend so that wasn't a factor.
Nevertheless its always worth a try. We just used put a piece of pipe on the bolt knob and gradually knocked it up into place. It turned out slightly rough where it had been glowing red, so I had to smooth it out a little.
I documented the whole process.
http://forums.gunboards.com/showthread.php?t=32533
http://forums.gunboards.com/showthread.php?t=76690
Nevertheless its always worth a try. We just used put a piece of pipe on the bolt knob and gradually knocked it up into place. It turned out slightly rough where it had been glowing red, so I had to smooth it out a little.
I documented the whole process.
http://forums.gunboards.com/showthread.php?t=32533
http://forums.gunboards.com/showthread.php?t=76690
