The one other scenario that I can imagine is the fact it may be a standard Model 70 barrel and action that has a alternative XTR stock. That is unlikely however...I suspect that it is while you describe, an unmarked XTR. The guts of your rifle would be the classic https://winchester-model-70-xtr-f93297.spintheblog.com/27178249/winchester-classic-compact-can-be-fun-for-anyone