i have been shootingeaston xx78 super slam arrows but needed to buy more this year and all i could find was xx75's instead. my question was is there any weight difference they are both 2315's at 29.5 inches. i know they are different alloys and was just curious on weghts because i dont have time to shoot before going afield. anything will help.

I went to easton.com 2315 are 11.7 grains per inch

They are the same weight and spine so you shouldn't have to worry.