Truman said:
Well they aren't case hardened and most still feel sticky to touch on the main body of the salami. Its only up near the tops where they are thinner that the casing is drier and somewhat harder. I had read that you don't want more than 10% weight loss per week but have since found out that it depends on how thick your salamis are. I used 38-42 hog casings so can expect to lose moisture quicker and therefore mine will be ready a lot sooner.
They are looking pretty good! Firstly, the sticky/tacky skins can be a few things, however given that your humidity isn't too high/low, I'd say it's probably yeast on the skins. That's not a bad thing, it's a precusrsor to the mould that will follow.
You have some nice white spots of mould there, keep an eye on them to ensure that the white mould spreads. You can 'spread' it manually over the salami if you like by washing/sanitising your hands and literally wiping the mould around the salami with your fingers. It'll look and feel obscene, so do it in private. It's a little like making camembert - when you see the first tufts of white mould, you rub it over the surface of the cheese with clean hands.
Speaking of mould, if you want to encourage some good white mould, you can take some camembert or brie rind, or the casing of a mouldy salami and add it in to a spray bottle with some water, then mist this over your salamis. I use a bit of the p. Candidum powder that I have for cheese making. If you get any black mould on your salami, wipe it off with a cloth dipped in vinegar. Blue and green moulds can be bad, but... the fruiting bodies of some white moulds can be blue/green so they aren't necessarily a sure sign that you need to bin them.
You mention that the tops are thinner - it's possible that the salamis weren't stuffed fully? When you hang them, the meat falls to the bottom of the casing which makes the tops look thinner. The tops will then dry out quicker, leaving the sausage with a varying consistency from end to end. Or maybe it's something else.
And yes, with hog casings which are slightly smaller than ox runners, you'll dry faster and be able to eat them sooner!!