Contour numbers do vary greatly between makers. Also, how long the shank is (full diameter in front of the recoil lug) will affect the weight of the final project. I do not understand folks that have a #1 and leave a 3.75" shank.

For a lightweight 260 or 7mm-08, I'd do a Douglas #1 contour (or a #2 if I wanted a little more meat) with a 1.25" shank. I did one up on a Rem600 in 7mm-08 that is fatter than a MR contour but thin enough to keep the weight to a minimum.

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RH