I will have to dissagree there Brian Williams
Case walls are thinner on 45 LC and the internal base of the case makes it a weaker case, if its a standard 45 LC. And a Long Colt will show pressure sighns at much lower pressures than a 44 mag.
call what I say bunk if you like, but your wrong if you use standard 45 LC case.
I use standard Winchester and Remengton.
The reloading manuals that I have and its 3, Serrra I trust the most and this is compairing standard 44 mag loads against 45 long colts for the Ruger and TC contender place the loads for the 45 LC for the same bullet weight of 240 GR most use very close to the same powder loads with the LC going a little more with the same powder, BUT the bullet speed is lower due to the lower pressure of the bigger case making lower pressure.
44 mag with2400 powder at 23.3 gr @ 1500fps
45LC with 2400 @24.3 gr @ ONLY 1200fps
These are maximum loads again using the same bullet weight of 240 gr..
You cannot safely run bullets at the same speed with a 45 LC at the same weight as a 44 MAG. It should not be done, I not saying you cant. I have my self, I am fond of the 45 LC and have a number of guns in that cal.
I have pushed bullets to the point that casses show sighns of stress at the base, and all things equal, the 45 lc with the same bullet weight will never preform as well as a 44 mag in a safe manner. If your pushing 45 lc that hard, I hope I am not standing beside you on the range. The gun might take it but the case will not. I have seen case head seperation caused by over pressure loads, thank god not in one of my guns, I would not recomend it to my friends or any one here.
Read your manuals and stay below the max loads.
One other thing, you certantly cant get any factory loads with any pressure higher than the LOW recomend hand loads for the long colt.