This story is similar to several Roy stories credited to the team Al McKimson, Pete Alvarado, Randy Steffen and Andrew Bensen by Robert W Phillips. See Roy Rogers #24 Silver Spider, #25 Trades Lead, #26 Jerkline Feud, #27 Mustang Mountain, and #28 Apache Blood.
The art may vary a bit since several of them worked on the same story (also by R W Phillips)
Al McKimson was a pen name for several artists. First the brothers Chuck and Tom McKimson. Others were Pete Alvarado, John Ushler, Randy Steffen, Andrew Bensen, Hi Mankin, Mike Arens, Alex Toth.
Art identification by Steinar Ådland December 2010.
Last half page Subscription Form for Dell Comics.
Photo of Roy and Bullet, and small drawings of Roy and Dell Characters.
Inside back cover.