Hello, I made a batch of bratwurst last night and threw them on the grill for dinner. All of the casings split on them once on the grill. The casings used were a hog casing and the package said they are to be used for items to include brats. I am checking to see what causes this. This was my first time making sausage and was a fun experience. On the advice of others from this forum I purchased the Northern Tools Grinder/Stuffer and I was pleased with it's performance. I think my next purchase will be a stuffer. Thanks for any help, sorry for no pics but you could say these weren't the prettiest things to photograph.