A friend gave me some 303 enfield rounds, circa 1953. Naturally, being a reloader I had to take one apart and see what was inside. The bullet released easily with the second hit of my kinetic puller but no powder came out. Looking inside I see a plug, looks like maybe cardboard that is keeping the powder in and I guess compressed or at least right on top of the powder. Is this common with milsurp ammo? I don't ever buy any and have never heard it mentioned in any forums before but probably wasn't thinking about it anyway.