thanks! good to know too. i wish they were stated on the package of all the manufacturers because i notice a significant difference in stiffness verses the "floppiness" of round core strings, imo anyway
Hex core nickel round wounds would be unusual because most manufacturers use nickel-plated steel instead of pure nickel. Also, hex core is the most common core for all manufacturers. That is one of the reasons why it's not listed for most manufacturers because it is the industry standard. Round core is unique and most string makers will be specific about them.