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Why the change and why do you care?
I ask due to the confusion about what you really plan to do with your wreck line vs. cave line. For laying line on a wreck or for penetration I have found due to my aging eyes that color not number makes all the differance. Shooting a bag if blown off the wreck number does not matter. Abrasion resistance = debateable depending on laying skills. Tieing off to the wreck for an ascent niether will work in any kind of current.
Eric