I grind twice with most sausages. First grind very coarse thru kidney plate or 3/4" plate. Then I add salt, cure and seasoning for protein extraction and allow to sit in refrigerator for at least 24 hours. I use to dilute both the salt and cure in water, but after reading up on meat science posted by some of the universities (Texas A&M, Ohio State, Kentucky to name a few..) I started just diluting the cure in the minimum amount of water necessary for even distribution and now add the salt as it because salt soluble protein extraction occurs best with a 6% salt solution. Straight salt will give you a higher salt solution using the liquid leached from the meat as the salt penetrates.
YMMV......I find I get a better bind, and now use less milk powder in my mixes.
YMMV......I find I get a better bind, and now use less milk powder in my mixes.