Coincidentally I've just taken an ancient HW25 (What? Youngest son's first gun and it was knackered then! ) into my local gunsmith. After he stopped laughing and I'd explained that the blueing, the bolt for the stock and the bent barrel needed fixing, for sentimental reasons, he set to work. Aaron Wheeler does a very good line in blueing, did his best with the barrel (nipping the jaws back together helped) and told me what he'd done with the bolt.

The seating was stripped so any appearance of the bolt tightening was exercise in insincerity at best. From there, knowing that I wasn't after restoration level work he seated a nut of the appropriate size and all was well. He advised a castellated grip washer - I think on the trigger mount or there's an issue with cocking the rifle.

Doesn't sound like the same issue really but thought I'd share. I'm unendingly impressed with the solutions you guys come up with