The rifle above help please.
is the rear scope base mount tapered as on the newer sakos,
my 691 is,so same era,i'd say most likely!
Mine is too
My old one was. I'm sure all sako rifles have the taper.
My old M591 308 was std sako dovetails as I just bought a set of bases and optiloc mounts from my local shop and I never had a problem
I've a drone on my m591 Bob, tapered dovetails , i ordered the interference fit rail from Alan Rhone
I was a bit dubious but it's never moved and drone is on & off & keeps zero