Stuart Ottesen, THE BOLT ACTION Volume II, page 139, about the Ruger Model 77 (tang safety), said this:
"While the recoil lug under the receiver ring is relatively small, optimum advantage is gained from what cross sectional surface it does have. The patented front guard screw works on a rearward diagonal of thirty degrees to physically draw the lug back into full contact with the stock."
Thus also is the cantilevered recoil plate of the M77 TS .458 WinMag "African" and all the RSMs, bearing the primary recoil lug, snugged into full contact when that 30* rearward diagonal screw is tightened. Angle in front of that screw is 30* from perpendicular, viewed from the side, screw tilting rearward.
Ron aka "Rip" for Riflecrank Internationale Permanente NRA Life Benefactor and Beneficiary .458 Winchester Magnum, Magnanimous in Victory THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.