I'm traveling (by plane) between 2 Schengen countries and want to transport several large big Hungarian Salami sausages in my hand luggage. Do I need to worry of any kind of possible hassle when passing airport security?
I traveled with one big (~2ft) salami within EU, and seen people flying from Madrid with pretty big pieces of hamon in the carry-on luggage. Airport security didn't care about this at all.
However in your case it depends whether both countries are also in EU or not (some Schengen countries are non-EU, like Switzerland). If your destination country is not EU, you will have to clear customs on arrival, and it may not allow imports of meat products - check with the destination country, and be ready to declare it to customs.
If both countries are in EU, there are no customs then.