Here's what happened. I resized & trimmed to length. I loaded and most would not chamber. Then I took the resized brass & neck turned, then loaded some. Some would chamber. Then when I shot them, about half would split at the neck. I loaded & disassembled a couple hundred "experimental" rounds & finally gave up & found some once fired brass. I've been a happy camper since.
You are probably aware that the case body near the head is larger than the 308, huh? Another problem waiting to happen with the 308 cases, & the 30tc is about .100" shorter than the 308.