Ive recently pulled down some 1952 head stamped hungarian heavy ball 7.62x54R. I'm using the projectiles for a new Arisaka t-99 Ive acquired. Ive seen forums where individuals have used the pull down powder out of surplus rounds. This particular powder in clean looking, stick powder that looks a lot like IMR 4350 and smells about the same. Has anyone had any experience with such powder? Assuming the Arisaka round uses a similar weight round and has more case capacity I'm wondering how safe the 47.2 gr powder charge would be.