The Warne and LeupoldMark4 are both solid steel, same high quality, 20-MOA Picatinny rails.
The Warne fits the top of receiver with no over-hang or under-hang of receiver top at either end.
The Leupold Mark4 comes with a set of both 8x40 and 6x48 screws, but under-hangs rear of receiver and over-hangs front of receiver,
which may actually be more desirable for getting more eye relief with some scopes, on a .458 WM.

Is there another make of 20-MOA Picatinny rail out there that will fit a Winchester M70 LA-3.6" without having to have another hole drilled in it ?
Sumbuddy who know ?

A couple more Winchester M70 LA-3.6" actions with 2-piece bases instead of 1-piece rails: 8X40 Screwed and Glued with J-B Weld:

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Too bad the bolt faces on those two were opened up by about 0.010" for .404 Jeffery,
instead of for .458 WM+.
Switching of bolts and barrels would be required. crazy
But I thank God they are not Blasers.




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.