I used to have a Ruger Redhawk in 45 Colt ( stainless, 5.5" bbl). Sold it. The problem is with the 45 Colt case. It is tapered.
When you resize, with a carbide sizer, you make a cylindrical case. Then, when you shoot it, the brass expands back to "tapered" shape. Resize back to cylindrical. Fire/expand/resize. Repeat... This works the brass hard, and it is more likely to work harden and split.
44 mag cases and chambers are cylindrical. Less working of the brass. Longer case life. Load the 44 mag from mild to wild. You will get all the "thump" you want with the 44 mag.
I use a S&W 629-3 (44 mag) with 4" barrel. Love it.
