1065 has roughly 0.65% carbon, which places it well into the "high carbon" steel category, which is anything above 0.50%. Lowering the carbon tends to toughen the steel, so 1055 and 1065 are commonly used for swords and choppers, but run softer (55-57) to increase the toughness even more at the expense of edge holding. 1095 and 440C have around 0.90-1.10% carbon, which aids in hardness and edge holding, and they normally are around 57-59 HRc in production knives. 1065 at 58-60 as in these Ropers should make a very good all-around steel for a pocket knife, and easy to get a wicked sharp edge on, too.