Unusual weights for 57s?

Debs calcium dropped and the oral supplements only provide so much, so this from the ER as we wait for blood test etc...
Was sorting through the fractional 90% this weekend, weeding out culls, and sorting by year to get that in control, and think I noticed an oddity. Has anyone noticed a consistent pattern of excessive weights in the halves and quarters that year of 57? Seems like they were strikingly higher. I can't remember the number now but these were just mostly mildly circulated, maybe a few AU and BU in the mix, and they weighed out at well OVER the BU nominal weight of 250. And no, I didn't have an extra coin in the stack.
Was sorting through the fractional 90% this weekend, weeding out culls, and sorting by year to get that in control, and think I noticed an oddity. Has anyone noticed a consistent pattern of excessive weights in the halves and quarters that year of 57? Seems like they were strikingly higher. I can't remember the number now but these were just mostly mildly circulated, maybe a few AU and BU in the mix, and they weighed out at well OVER the BU nominal weight of 250. And no, I didn't have an extra coin in the stack.
