I recently bought a Remington 700 action dating from the 90's and it has a screw in the bolt handle. Was this factory? Havent seen this before i have several action dating from current to late 60's.
It was quite a common mod for a while. Its to keep the oem silver solder joint from breaking. Usually they were screwed, soldered, and then blended in. Now we just tig weld them together.