Frankly after reading the replies here it cements that lack of knowledge here. Most should stick to PB&J sammies and leave meat cooking to those of us who know what we are talking about.
The OP asked about Venison which is not cook like beef. (Your first tip of the day). Lean game meats like venison and Water Buffalo can be dry and tough if prepared incorrectly (the methods you jokers recommended)
The OP wants tender and juicy meat and you guys are not helping him so It looks like I need to bail you dopes out again and why the correct answer I gave earlier is "Sous Vide".
Seal your venison roast (s) after applying course salt, pepper and any aromatics you like (Thyme, Rosemary, etc)
Lard the roast with garlic if you want a real treat.
Place in the water with a souse vide machine at a temp between 130 and 138 F (your choice) and cook for 12 to 20 hours (your choice)
Cut open bag(s) and reserve the juices.
Sear the roasts in a very hot cast iron pan or use a searzall.