I've always dry cured bacons ect. Been spatchcocking turkeys with good results but read about wet curing and I'm interested. I understand meat plus water weigh for salt and cure measurements but I'm curious how long it should be in the brine. Is injecting the brine needed?
The rule of thumb is that the salt and cure will travel 1/4inch every 24 hours.
So if you have a 4 inch thick piece of meat submerged it will get 1/2 inch travel total (from all sides towards each other) in 24 hours. So a 4 inch piece of meat in theory takes 8 days and then a couple days extra to be sure.
Now, with that said, if you have a thick piece of meat like a ham or a turkey, you will want to inject that same solution all over and deep into the meat. This will then ensure everything gets cured all the way through AND you get faster curing times with the liquid traveling both outside-in and inside-out. This is what I do with my hams, turkey, and chickens. It speeds things up and makes it fool proof.
I like doing pork butt's as hams because the flavor is still amazing, the cost is way cheaper, and there is the flat shoulder blade bone to work around versus big round leg bones.
I have a full "how to" on how to wet cure and inject a pork butt to make a holiday ham here in the Thanksgiving Central
https://www.smokingmeatforums.com/threads/how-to-holiday-ham-from-pork-butt-pork-shoulder.318276/
FYI, I dry cure my bacon as well but have wet cured it before out of curiosity and it was all the same in the end. The difference was the amount of extra steps and cleaning of a web cure on the bacon. With big cuts like pork butts/hams, you will want to wet cure so you can inject and ensure it is cured all the way through and around the bones.
The same process works with a salt brine that has no cure in it. I do salt brines like this every time but have fell in love with the cure flavor on whole chickens, so I do that more wet cures than straight salt brines these days.
I hope this info helps :D