Yeah, for the people who are doing legendary pelts, you can use any single gun because they will always be perfect.
I grabbed a perfect male buck elk pelt yesterday, but had to drop it to finish the gunslinger stranger mission. FML.
Go get the Legendary Deer. You get a much higher chance for perfect pelts. Soon as I killed him and got the trinket from the Fence it was 3-stars all over the place by Emerald Station.