I hate to be the bearer of bad news but I would not shoot the rifle and especialy a 7 mm Remington Magnum after the rifle has been in a fire. In all probability the temper or the steel has been damaged in the fire. (*Changed! ) And could possibly blow up when a round is fired in it. So before I spent any money on it I would contact a professional gunsmith not just a repair shop and have someone that knows about this condition and the metallurgical property specification do some testing on the rifle. Unfortunately, fires have ruined a many of good weapon by damaging the temper of the steel. Even though it is not a Remington or Winchester I would contact the technical division of those companies and speak to a tech. specialist about the fire and effects it could have on the metal. They will have the information for you since I am sure it is not their first time they have been confronted with this question and possibly have done testing in this area.
Information and a word of Caution Only!
The Constitution is not an instrument for the Government to restrain the people. It is an instrument for the people to restrain the Government!
“Americans have the right and advantage of being armed. Unlike the people of other countries, whose leaders are afraid to trust them with arms.”
James Madison. Author of the 2nd Amendment