I would change and use the right primers. You need to be a lot more careful following proven safe fomulas you are following the recipe for disaster not being careful. don't know what you're shooting them in but older cartridges in older firearms could use lots of caution and safety cushion. You are removing some of that cushion. Make sure you know what you're using each and every time. Next thing you know you'll use Bullseye instead of 2400 then you need to change your name to lefty.