They're Allen head screws but not in a common size. I've found a T-25, 27, or possibly 30 Torx bit fits pretty well. Sorry I can't remember which one it is and I don't have any of them with me to try, but the one that fits works fine.
I have the savage 12 VLP in 22-250. The screw heads ARE Allen type. The wrench wouldn't fit on the forward bolt, which was machined improperly,so it got damaged. Savage sent me a new screw, but it was .070 too long which interfered with bolt closure.Instead of trying to file it down and ruin the threads, I took a small brass washer from an Easton hunting arrow tip(weight) and filed all around the OD untill it was flush with the screw head OD and used that as the spacer! The wrench I use is .153 " or 3.87 mm. Like 270 WSM said, don't overtighten! Good luck ! Oh, my Savage shoots great! Rod
A forum community dedicated to hunters and enthusiasts. Come join the discussion about optics, trails, clubs, gunsmithing, styles, reviews, accessories, classifieds, and more. The friendliest gun forum on the Internet!