Gambler's Guns — Lee Thomas

Gambler Claghorn Jamison was on the gold trail to Canada when his dreams of bonanza were interrupted by screaming bullets, followed by a meeting with a fleeing man who had obviously been doing the shooting. Jamison didn't even know the beginning of the story - but he knew enough to tie him in with the trouble - enough to makecertain hombres add him to their list of human targets.