Hi guys I didn't know where to put this question. I recieved an 8lb can of dupont 4895 that was sealed with the metal strip over the push pop lid. Powder smell ok but the inside of the can is starting to discolorand almost rust in places. Loaded it up in a 308 and ran it over a chono. Results came back about 10 to 20 fps slower then my current imr. Should I burn the rest of it up in my M1Afor highpower.