That was a long time ago Ben, I know it was over 25#, but not much more. It was thrown on a Brent C, as that is what they used at PSU at the time. It was thrown on a 24" plywood bat. I let it sit for 3 days under plastic before trimming. It was a little heavy, but the prof(Gallas) said that it needed the weight for the curve and the size. Walls were 12" high. I haven't thrown anything that diameter since, as I don't have anywhere to fire it.
I was an oldie at PSU, a teacher of 3 years, and later starting my career. Many of my grad classes at PSU at the time were assisted by other grad students in the MFA program. I personally was insulted that these students were trying to show me how to work. They were good at paper work, but poor at teaching. I often would give hints, or tips to other students struggling with throwing or assembling. I was often there all day, and in to the night working when most of the authorities were not around. I would always stress that there were no right or wrongs in throwing as long as certain major concepts were attained. However, I found that they asked why I would use certain finger positions when throwing, or certain techniques for opening large, and I would explain. It actually helped me prepare for more classes in the Fall, as my throwing had to continue on with the barrage of questions that these varied skills students would ask. HS kids are much less pushy with their questions, more awed.