If you look on YouTube, you can find many of the old Hopalong Cassidy films. In fact, it's the best place to find them, as these are the original full-length movies and are in beautiful condition. This is a sharp contrast to many other B-westerns, where only truncated versions are available thanks to the films being cut down a bit to fit them into television time slots. This is where I found "Stick to Your Guns".
When the story begins, messages are sent out to the boys of the Bar 20 Ranch to come help, as rustlers are robbing an old friend of theirs. Hoppy and California (Andy Clyde) also receive word, but they are much closer. So they head there first and pose as bad guys...hoping to join up with Nevada Teale and his gang of thugs. They are successful in convincing these folks that they are evil...and one of their first duties is re-branding stolen cattle. The other duty is not getting their heads blown off, as the gang members are on edge an soon begin sniping at each other. How long they can remain in the gang without getting shot or discovered is anyone's guess!
I noticed that one reviewer felt that this was one of Hopalong Cassidy's last good films. Well, my reaction was pretty much the opposite. While I've seen better films he made later, I felt that this one was awfully dull. Not bad...just not that exciting. It's worth seeing...but had few memorable scenes aside from the poker game that ended...in death!!