Tut
There were some 600 remingtons stocked somewhere in europe that you can find pics of on the web. They look a lot better than Remington's stuff. How does this rifle shoot now? When I stocked my 600 350 I glass bedded it to the muzzel and fit the cap tight.
The custom shop stuff liooks pretty good in the pictures. But Remington is not what they used to be. As to the hex screws I think that was done so you could use a torque wrench. Torquing a Remington action is important Especialy the old 3 screw ones.The only thing i would change on my 600s would be the plastic trigger guards. I also have an early 700 varmint BDL and quality is very high on it. Suspect a lot better than the new stuff. Wood and checkering is perfect.
I would shoot it,glass bed it, shoot it again for comparison and if you improve it put it back in the safe. Only thing better than the laminated stock is a composite. No plastic guns in my house except the 12 ga. mosberg 500 pump.
Tom