The only real other scenario that I can visualize is the fact that it may be an ordinary Model 70 barrel and motion that has a substitution XTR stock. This is not likely even though...I think that it's when you describe, an unmarked XTR. There exists an unknown relationship situation https://dominickpgwma.yomoblog.com/32867318/new-step-by-step-map-for-winchester-model-70-featherweight-review