I took my Contender in 7-30 Waters to the range yesterday to shoot up some re-loads that I had loaded a couple of years ago. These were once fired 30-30's that I ran through my 7-30 sizer die and were fire forming. About half of the cases split in the neck, some worse than others, different brands of cases, Winchester, Federal, and Remington. I've done this in the past with good luck but not so this time. I should have annealed the case necks before sizing them, but curious why problems this time and not in the past. One thing that might have affected outcome is that the powder that I used in most of them was some 50 year old IMR 4895 that shows the slightest sign of starting to go bad. I have read that old power left for a period loaded can affect the brass. Some of the rounds were loaded with about the same age H-335 and some of them split also, which surprised me as I thought that the double based spherical powders were not as prone to deteriorate. Should have annealed first, but still???