Injecting 10% (weight of the meat) of the brine in the meat..... 10#'s of meat and 1# of brine (pint) evenly throughout the meat... space the injections what seems appropriate... That will help the meat get evenly cured or even spice/salt etc. distribution.. Trying to "dry brine" a piece of meat over 2" thick, and get an even internal distribution of "stuff" is not likely... You should still turn the meat and stir the brine every few days... I have read where the solutes in the brine will separate over time and mixing is necessary...
Dave
"Injecting" the meat can mean a couple things - are you using a needle injector or a broadcast injector?
The injector (or Artery) needle is on the left and has one straight outlet shooting the brine into the meat in a straight line. For this type of injection, you have to space the injections close together as the brine will only soak in to the meat in a straight line.
The broadcast needle is on the right. There are holes in 360° around the needle, so the brine shoots out perpendicular to the needle, covering a much wider area and enters the meat in a wide path. This is a much better application for injecting. The straight method is ok, but you have to inject it up to 4 times as much.
I have cured literally tons of meat and have never had to stir the brine. The ingredients remain in suspension just fine. When making it, I use cold water, add the ingredients and stir it until it becomes clear, then add the meat and don't touch it again until it's done curing. It will often get thicker and turn red from the blood, but that is perfectly normal.