CFE pistol is a good place to start. I like the idea of using the 160gr 45 acp data as a starting point as well.
I try not to use a recoil spring any heavier than is necessary just because of the slam forward into battery. Don't forget there is a back half to a 1911. A heavier main spring combined with a flat firing pin stop, will slow the rearward movement of the slide as well. So you don't need to make it all happen with just the recoil spring. You need to time both, rearward and forward movement of the slide to make it balance correctly.
Shooting 45 acp in a Rowland is not a good thing as the acp headspace on the case mouth. Your flat and pierced primers are classic, excess headspace issues. Not safe. The pierced primer is the reason for the low noise and lack of cycling, pressure escapes through the hole in the primer.
This will be fun to see how this works out for you.
