The general rule of thumb is; the barrel life of a bore is proportional to lbs. of powder burned with a few exceptions. The biggest exception would be how "overbore" the cartridge is. Meaning how small the bore is in relation to powder burned. Onother good indicator would be to look in a loading maual at "cup pressures" for any given load. You will notice some calibers operate at much lower pressures. These will have longer barrel life all other things being equal as well.
If you handload you can increase the life of a barrel burner by using mild charges of modern cool burning powder. If you never shoot a barrel hot(cool 3 to 5 minutes between groups) you will GREATLY improve barrel life as well. I remember M60 barrels when I was enlisted that we had to grab with a rag to change out because the chamber area had a nice orange glow.:barf:
If you handload you can increase the life of a barrel burner by using mild charges of modern cool burning powder. If you never shoot a barrel hot(cool 3 to 5 minutes between groups) you will GREATLY improve barrel life as well. I remember M60 barrels when I was enlisted that we had to grab with a rag to change out because the chamber area had a nice orange glow.:barf: