Just noticed this offering from Starline brass:
I've been looking for a shorter .45 Colt case for my S&W Mountain Gun but couldn't find one that would work. Couldn't use the .45 Auto Rim because of the excessively thick rim. Thought of the Schofield but the dimensions were slightly off. So I waited.45 Cowboy Special (Large Pistol primer)
Cowboy 45 Special, 45 SPL, C45S
0.892 - 0.896 O.A.L.
The Cowboy .45 Special is a case that is optimized for use with light loads in .45 Colt caliber revolvers for Cowboy Action Shooting. Light loads with excessive airspace are a recipe for case splits and erratic function. By using the Cowboy .45 Special case, with its .45 Colt rim and .45 Auto length, the problem no longer exists. While many claim that .45 Auto load data can be used in this caliber, it is important to realize the limitations of the firearm it is chambered in and only use loads that fall within the pressure range of that firearm. Generally these can be loaded using .45 Colt dies and a modified (shortened) crimp die, or .45 Auto Rim roll crimp die.
Then I saw this from Starline. New as of November. I ordered 250 cases to experiment with but ... ?
How to load these cases? I can use data for the .45ACP but that doesn't include my heavier 255 gr. cast bullets. If I use .45 Colt reloading data I risk excessive pressures.
Thoughts?