This is the info I got from Jay that he got from Marlee:
Remington Bolt Mod to a Savage Bolt Head 01/07/2006
Step number one: is to get the parts ordered, Midway, Savage Shooters Supply, etc.
You will need all the parts for the Bolt head plus the large hole Bolt Head Retaining Pin.
I use the bolt head with the small firing pin hole and bore it to fit. Now the hard work is completed the rest is all fun.
Step two: If you do not have a threaded stud to use in the front of the Rem bolt, make it next.
Step Three: Put the bolt in the lathe, stud in a 3 jaw and the tail stock in the firing pin hole and scribe a line on the bolt back from the rear of the lugs, about .680” and in between the bolt lugs, note the photo. Cross scribe this line at .687” back from the rear face of the Rem bolt lugs. You are marking for the center punch to drill the retaining pin hole. Remove the bolt from the lathe and drill this hole, D-bit or .247”. This hole is the only critical part of this job and has to be in the right place.
Step four: Put the bolt back in the lathe and using a cut-off blade, cut off the Rem lugs. Make this cut down through the lugs so as there is a little bit of the rear of the lugs left on the bolt. Using a steady rest on the bolt body face off the front of the bolt to just remove the rest of the lugs.
Step five: Turn the bolt around and put the bolt body in the 3 jaw. Bore through the bolt body from the threaded end using a Y- bit or .404”. Turn the bolt back around and set it up in a steady rest with the stud in the 3 jaw. Use a boring bar to open up the end of the bolt to fit the savage bolt stud, .465” x 1” deep. You do not want the fit to be tight, the bolt head needs to move around a bit. Cut a radius on the inside edge of the hole to match the radius on the savage bolt head. The bolt body is now complete.
Step six: Put the Savage bolt head in a 4 jaw and dial in the stud. Cut .200” off the stud, drill the firing pin hole to 1/8” up to 3/16” from the face of the bolt and cut a radius on the edge of the hole. Turn the bolt head around and put the stud in the 3 jaw and make a light clean up cut over the outside of the lugs. Do not cut the front or back of the lugs. Set up the bolt head in a mill and cut the follower grove (extractor lug), make it the same as the grove in the Rem lug. The bolt head is now complete.
Step # 7. Make a tool to hold the nose of the firing pin and put it in a chuck in the tailstock. Put the firing pin in the 3 jaw and fit the nose of the pin into the tool in the tailstock. Cut the front of the spring shoulder back .144” and cut the front of the firing pin down to 1/8”, (see photo) or for a nice fit into the Savage bolt head. The Rem firing pin is a little larger then the firing pin hole in the Savage bolt head, fit this very carefully. You will now find the firing pin in a little long, adjust the tip back to about .050” of protrusion.
Step # 8 put it all together and test. Make adjustments as needed.
