The Sako Optilock ringmounts in 1" or 30mm blued or stainless. They only come in the one height which is fairly low. Advantage is the plastic ring inserts. Disadvantage is the cost and a little extra weight than the Leupold rings.
Leupold Sako lows in 1" or 30mm work fine too. Never had any trouble with any of them. You've got to remember with the Leupolds that the base screw goes on the left side of the receiver because of the tapered dovetail.
"The 257 Roberts, some people like to call it the “.257 Bob.” I think these people should be hung in trees where crows can peck at them." - David Petzal
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