The one other circumstance that I can envision is it could be a typical Model 70 barrel and action having a replacement XTR stock. This is often unlikely even though...I think that it's while you explain, an unmarked XTR. The sides are a bit rounded to reduce snagging when shouldered. https://winchester-model-70-class53196.gynoblog.com/26479003/what-does-winchester-model-70-featherweight-review-mean