I use Missouri Bullet Company's products in several calibers. I'm not sure what the actual definition of Cowboy Velocity is, but I'd say less than 850 fps in a 38 special. Maybe a lot less. Others will know more. That said, they make several different styles, weights, and hardness of lead bullets. Generally speaking, softer lead is better for slower speeds and harder lead for faster/magnum velocities. There are exceptions. Anyway, I use the Cowboy 158 grain at BHN hardness factor of 12 for everything up to speedier 357 magnum, for which they make an Action bullet that is I think BHN 18. I'm very satisfied with my results, with very little or no leading. I don't know what velocities you are getting with Red Dot, but I am guessing you would be quite happy with the Cowboy bullets. Other lead bullet guys will know much more than me about this, and maybe they will chime in with some more info for you