Welcome to Pellet Fan!
Will try the ground Montreal!
The tenderloin is commonly called the backstrap. Grill it.The rump steak is, I guess, the round steak. Make it into Swiss steak. Serve it with mashed potatoes.
You are correct some people do call the backstrap tenderloin, and their wrong.The backstrap is the loin.The tenderloin is located opposite side of the backbone from the backstrap.Much smaller piece of meat and the BEST piece on a deer.Tender and sweet.