The one other scenario which i can visualize is the fact that it could be a normal Model 70 barrel and motion with a replacement XTR stock. That is not likely although...I suspect that it's as you explain, an unmarked XTR. This can be an more mature thread, you may https://winchestermodel70xtrfeath45557.ivasdesign.com/48700206/the-2-minute-rule-for-winchester-70-featherweight-for-sale