350 oven roast beef cooking times chart - Kitchen Ranges

This is my favorite:
FLASH METHOD
Standing rib prime roast beef
Olive Oil
Coarse Salt
Coarse Pepper
Garlic (chopped/juice or powder), if desired
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1. Have roast beef at room temperature (important).
2. Rub thin coat of olive oil and rub in seasonings
3. Preheat oven to 500 degrees.
4. Cook 5 minutes per pound. (50 minutes)
5. Turn off oven and leave roast in oven for 2 hours.
6. DO NOT open oven at any time until the 2 hours (plus the 5 minutes per pound) are up. VERY IMPORTANT!
(In your case DO NOT ADD roast weight to 12 instead assume that both roasts equal 6 lbs.)

Yields a perfect medium rare (pink center not red)
If you want a rare result then cut time to 4 minutes per pound

what I do so it's just falls apart and great for pulled sandwiches is
set oven at 220F, season roast and put in pot with 1 or 2 cups of water, or put rack in pot so roast is NOT in water, your choice, no rack that fits in pot then get aluminum fold and crumple it up in long line and coil it to fit in bottom of pot and put roast on it.
COOK for 5 hours at 220f, you can devoure it as soon as it comes out of oven, it will just fall apart and great for making pull beef sandwiches, or let it sit for 1/2 hour and it will firm up and then it can be sliced thin or thick.
I have even done it with no water but need to be on rack or off bottom of pot as not to burn, you get a more carmilised coating on roast..
Chuck roast is tough cut of beef and need to cook for long time, 220f for 4 to 8 hrs will do the job

the temp is about right and the time is 2 3/4 hours for medium rare
in your browser bar type in ---cooking times for 3lb chuck roast--and there are recipe pages for all cuts of beef , temperatures and times

Cooking times are dependent on much more than weight. The shape of the roast, the thickness, the uniformity, the outside temperature, the quirks of your grill or oven... the only way to cook a roast properly is with a probe-type thermometer. You decide what temperature you want the center of your roast and cook it until it reaches that temperature. The lower the cooking temperature, the more evenly the roast will cook. 300 degrees will take awhile but the outcome will be excellent. You can Google roasting temps to give you a general idea, but if you use a recipe time, you will overcook or undercook your roast, probably, 60% of the time. Probe thermometers are cheap and reliable.

Don't roast anything directly from the freezer. The most likely result is burning the exterior while the interior likely doesn't cook at all. Always thaw the meat before roasting; this goes for any meat. Once the meat is thawed it will cook evenly.

theres a chart on the linked site that tells you how long to cook

Roast Beef Cook Time

350 fht 30 mint

350 f.h.t 30 mins