It seems the 6.5 Creedmore is the perfect cartridge in all but one catagory: barrel life. It shoots like a laser, has excellent range and accuracy, relatively slow compared to many cartridges and is probably more efficient than most. However, what causes it to have limited barrel life? My recollection is that certain very high pressure cartridges like 220 Swift wear out barrels quickly whereas the old .308 or 7.62 X 51 mm or 5.56 have long barrel lives. The .243 has a reputation for less than stellar barrel life. I recall Mule Deer indicating something about shoulder angle directing gases being a contributing factor.
