i just came across a few boxes of 7.62 mm rifle shells that are rather old i think. all the writing on the box is in french and the shells came from Paris. thats all i can make out on the box other than it has a stamp that says (30.06 BALL). will these rounds fire safe out of my remington model 7400 that is chambered for 30.06 springfield. i cant see any difference in the shells visually but i do not want this to blow up in my face or wreck my gun. any help would be great. thank you.