The 45 Colt is a suitable cartridge if you think about its limitations. Factory loads are generally kept light because there are enough Colt single-action revolvers around 150 years old that can only be fired. The general 45 COLTrule of thumb is that a hot load goes for a modern one.
What happened to 45 long colts?
The Frankfurt Arsenal, which supplied almost all of the ammunition to the army, stopped loading .45 colts and gave .45 S&W cartridges to the troops. The name .45 Colt was changed to “.45 Long Colt” in conversation to distinguish it from the smaller S&W cartridges.