The Winchester 1873, specifically. By 1892, the West was pretty much won and settlers were everywhere and the Cowboys were winding down.
Close, if exactly backwards is close.
https://opinionator.blogs.nytimes.com/2015/05/25/how-the-civil-war-became-the-indian-wars/?_r=0
The War of Northern Aggression segued into the western Indian wars.
Maybe you’re thinking about earlier fights/skirmishes Texas Rangers had with Commanch and others, and even a cannibal Indiana tribe.