Prompted by the previous post, a friend of mine sent me a scan of the cover from this William Heuman novel. I like it so much I decided to go ahead and post it. I feel like I ought to know who the artist is, but I can't read the signature on the scan. I own a copy of this book but have never read it. I may have to dig through the stacks and piles of books and see if I can find it. In addition to Westerns, Heuman also wrote some YA sports novels, and I'll bet they're worth reading.
UPDATE: Thanks to Steve Lewis, I can confirm that the cover of this book was painted by Lou Kimmel.