I also heard about cooking roasts on a much lower temperature on a radio show called Food News with Melinda Lee. I told my mom about it, and although she was skeptical, she tried it and said it really did turn out much better and more tender than the old method of cooking it at a higher temp.
Here’s a link to a site that says how to do it here
Just make sure you ultimately check the internal temp (which is described in the article above) of the meat to make sure it’s correct. Put your instant read thermometer into the deepest part of the meat without touching the bone.
You should check out Melinda Lee’s weekend radio show (which can be heard online) and check out her website. She’s very easy to listen too and is super-helpful if you call her on the program. There are all sorts of cooking tips and recipes and resources for cooks. There’s even a whole section on her site about what temps all the different meats need to be cooked to. You can see her site here And she will always e-mail you back if you have a specific question. Have fun.