That sounds a bit low. I roast mine at 350 deg. and it takes about 45 min. per pound to cook. What's important is the final temp. inside the roast. You need to get an oven thermometer that you can stick into the roast and check to see if it reads at least 170 deg. If not keep cooking. The lower temp. you cook at means it will take longer to reach 170 deg. inside.
Cook at 350 degrees for about 3 hours.
It depends on the weight to know the time to cook it. A bout 20 minutes a pound.
A 6lb boneless pork loin roast should cook in a crock pot on high for 3-4 hours. A pork loin roast in the oven should cook for about 2 hours on 350 degrees.
Cook to 170 degrees,
I will always cook a pork roast or loin till it reaches an internal temperature of 190 degrees.
about 45 min
I've been told 200 to 220 degrees.....
how long you cook a pork roast in nuwave oven
10 minutes
About 6 hours its 10lbs per hour take an extra hour to be sure
I use the rule of 11 min per lb, it seems to work best for me. Jim
A prime rib can be frozen, but it should be thouroughly thawed before cooking.