RE: best jerky gun?
I have a Cabelas gun also. Works great.
Wildchild, you are getting too much air in there when you fill the gun. Try using a long handled spoon or something to push the meat farther down. Just filing smaller amounts at a time instead of a big glob helps get less air trapped.
They sell a plunger for these jerky guns, I believe.
I just use a plastic long handled spoon.