Stay away from anything marked +P in .45 Colt- I doubt that there are many factory loads in this range other than the Cor-bon loading. These hot loads are made for strong frame firearms and not recommended in a single action army or clone of any type such as the Ubert Cattleman or similar revolvers- it might not blow it up on the first round, but it would shoot it "apart" in just a few rounds.
All loads made in .45 Colt from the major manufacturers such as Winchester, Hornady, Remington, Federal and CCI are all standard pressure and will work just fine.
I do believe the Uberti is going to or has brought out a stronger and larger framed revolver- like the "Buckhorn" they used to make years ago in .44 Magnum called the "Callahan" that will take hotter loads for hunters that may compete with the Ruger Blackhawk, but I haven't seen one locally yet, and they only list them in .44 Magnum.