I had to look up what gammon was! I had never heard that term before. I too will cook a ham in the crock pot but only the hams I get from the pig that I buy from the local farmer. The processor does a wonderful job smoking them and they aren't near as salty as commercial prepared hams. But they are a little dryer and the crockpot helps that. I toss mine in with a can of sliced pineapple rings in juice. Comes out wonderfully. I cook mine on low all day. I plan on using the leftover juice along with the bone to make red beans for red beans and rice.