It's not possible to answer the question as asked. There are too many types, models and variations of these guns to consider. These guns can sell for as little as a few hundred dollars up to thousands, depending on what it is, when it was made and condition. Condition is everything when appraising a gun. As always, it's recommended that you have it appraised at a Gun Shop or qualified professional.
Having trouble identifying the model. In 1979 (date indicated by your sn), Browning produces the BBR bolt-action rifle, the B78 single-shot and the BAR semiautomatic rifle in 7mm Remington Magnum, but none of those had that 117 designation. What type of rifle do you have?
100-10000 USD depending on specifics
Browning did not make the Model 70, Winchester did. Also, the serial number is not a valid Browning serial number for a 7mm Magnum rifle. Please doublecheck your information.
100-10000 USD depending on specifics
You will have to call Browning with the serial number.
Need to know if it's a bolt action or a semi-auto.
7mm Magnum and 300 Winchester Magnum
500-700 or so
Made in both Bolt and Semi-Auto versions
26"
243, 270, 30/06, 7mm Magnum, 300 Magnum
Check with Browning customer service.