Here's a pre-64 with Bordens Bumps. The action was blueprinted and trued, the bolt body had recesses milled as shown. SS barrel pieces were machined, the halves JB welded in the recesses, then milled to be slightly oblong, creating close up and down fit as the action is closed. The bolt is true, has little movement when the action is closed.
Not needed on a hunting rifle, but sorta cool. Don't see many pre-64's set up like this. This gun has a 6.5-284 26" Krieger, glassed and pillared in a Boyd Jon Sundra sporter, finished by me, checkered by Errol Case in MO. Jewell trigger, Z5 glass. It's put a few pronghorn heads on the wall, WT's and hogs in the freezer.
Glare on the finish is from enhancement of the photo, actually not that shiny. More like the third photo. tung oil/urethane finish with a soft sheen.
DF