King B not sure at all what Kent’s chamber pressures are but I'd rather err on the side of caution especially with chamber pressures. With Bismuth I could reload so I would always know approximately what the chamber pressure is. However, with Kent, they do not sell their tungsten matrix as a reloading component so I could never tell what the inside of that shell is doing in the chamber. That in itself is enough to be cautious when shooting older guns!!!
All the best