I recently picked-up a very accurate old JC Higgins Model 50 (Mauser action/High Standard barrel) in 270 Win so I'm thinking about converting my almost 2-year old Axis II XP to become my first medium bore rifle (35 Whelen or 375 Ruger). I've already invested in a Boyds stock and improved scope for the Axis and the rifle is accurate so I'm okay with throwing a little more money into an inexpensive rifle for an ER Shaw barrel. I'm leaning toward the 375 Ruger, which would require me to also buy a new 110 Magnum bolt head and mill the bolt head shank shorter, as described here (thanks for the vid, DrThunder88):
http://www.savageshooters.com/conten...cation-(Video)

After reading this, I just attempted to disassemble my bolt:
http://www.savageshooters.com/conten...y-Instructions

I didn't get very far, because my bolt assembly screw (BAS) doesn't have a slotted head or the expected newer hex head on it. In fact, there doesn't appear to be a screw at the back end of the bolt at all; there just appears to be a bare pin sticking out.

So before I grab it with a pair of vice-grips (LOL), I figure I'd better ask here for bolt disassembly advice and also opinions and advice on the conversion in general.

Thanks a bunch!