The cover of Page Publications' Range War Westerns #3 is by Keith Chatto:
This issue is indexed on AusReprints. It was also issued under another Chatto cover as Gunslinger Western #2:
The lead story in these issues is The Fastest Gun in Cheyenne!, originally published in Western Gunfighters #25. It is also the lead story in Page Publications' Badman Western Library #4:
I initially assumed thought this was another reprint of the two issues above, however the rest of the contents differ.
And the moustachioed hombres differ too. Just saying.