I am getting into reloading and my dad gave me his old press and supplies from when he used to reload 20-25 years ago. In the box with his stuff he had a can and a half of Hercules 2400 powder and about 500 large pistol primers. I want to make some loads for my .44 magnum but im not sure if the powder and primers are any good because they have been stored in an attic for atleast 12 years and likely long before that. In South Carolina where i live it can easily get over 100 outside and very humid. I read a similar thread on the same topic but i have had different results than the other person. I primed and shot about 10 empty cases to test the functionality of the primers and they all fired but all of them slightly came out of the primer pockets to the point that i could barely get the cylinder to turn on my Blackhawk. Has anyone had this problem before? Should i try to make a load and test it or just start from scratch with new materials?