The first one I got from Springfield the dovetail dimensions I measured were as follows:
Front dovetail: 60 degree and a nominal .093” deep X .270” wide
Rear dovetail: 60 degree and a nominal .100” deep X .420” wide
Keep in mind that measuring an existing dovetail can be a bit tricky and these are nominal dimensions, I was more interested in knowing how much material I had left to work with so I could machine new dovetails.