Re: Sendero Contour
The main reason the sendero contour is so popular is any stock maker can inlet to it, then any smith can (that knows what he is doing at least) can correctly face the rear of the barrel to a dimension that a perfect stock to barrel fit is achieved for esthetic reasons only.
When it comes to Palma contours, I can tell you straight up that the Krieger Medium Palma and the Bartlein Medium Palma contours are not the same - at least on the barrels I have from both. Bartlein's is a tad heavier, enough heavier that for my sling and coat use I would order a Light from them.
For true target guns, the stocks are usually inletted such that they will take a variety of contours as target shooters may tend to change up their rifle configuration using different contours for a whole variety of reasons but still retaining the one stock. ALL of my field use rifles AND my flat range rifles have oversized barrel channels and have had a variety of actions, contours, and chamberings in them over the years.
In summary, either contour will do the task you described. If you are trying to make that perfect stock to barrel fit, make darned sure the stock maker knows the contour and maker of the barrel.
Otherwise, get the stock you want USED with a nice fat barrel channel for a cheap price and shoot the sumbitch!!!!!!