Never had a problem with screws or bases on any of my 45-70s shooting Ruger loads, bigger screws and 4 or more screws may be necessary on a pistol, but on a rifle it's overkill IMO.
I bed the rail in blue Loctite, it doesn't come off easy even after the screws are removed when I want to remove a rail!!
Tim
Tim,
Is that with the rail sanded down to match the contour of the barrel?
Don