.45 Colt can be loaded pretty hot, if you have the right gun, like a Ruger Blackhawk/Redhawk/Super Redhawk, or a rifle.
Reloading manuals have two sets of data for this reason.
Ruger Blackhawk revolvers in .45 Colt are marked as “.45 Caliber,” which I always thought was interesting.
It is all about advertising.
Don’t want the Name Colt on your non-colt handguns.
My trail gun is a Ruger Redhawk 44 magnum.
When buying my 44 ammo, the stereotypical gun shop clerk says, “you know most likely you’ll just shoot your hunting buddy’s leg off with that .44 if you ever get attacked by a grizzly.”
“I’ll take my chances. Two boxes please.”
Yep. I used to have multiple 45LCs and those hot load 45LC cartridges need beefier pistols or rifles with very sturdy breeches.