Its all good, but I actually prefer sliced muscle meat over burger.
I bought a deli slicer off ebay that I use to slice down semi frozen/thawed roasts for jerky. It works great and is much faster that doing it by hand.
I use a jerky shooter for burger jerky. It is similar to a caulking gun. Got it from cabelas. Its quick and simple. Much less work that rolling it out, trying to keep it the same thickness.
I use various home recipes, but one of my favorites is the Hi Mountain brand. The Cracked Pepper and Garlic flavor to be more specific. It is awesome!!!
One thing to note is that Hi Mountain recommends different amounts of seasoning depending on whether its muscle meat or burger.
Even if the weight is the same, it matters if you are using burger or muscle meat. They recommend more seasoning if using burger. Just someting to keep in mind when using a home recipe.