※ 引述《goldsingle (BE A FULLSER)》之铭言：
: 大家是不是太高估弹力球了
: 按照我查的棒球弹性系数的资料
: MLB的用球规定在0.514-0.578之间
: 可是以同样的力道攻击 0.514 跟0.578的两种球
: 距离也不过多增加4.6英尺
: 也不够就是1.5公尺而已 这是撞墙美技跟刚好过墙的差别
: 但是差距没有想像中大啊
: 如果中职原来用0.56系数的球 现在偷用0.574的球
: 但实际效果增加的距离可能连1公尺都没有
: 所以对于弹力球是否过誉了
以下文字节录自大联盟2018的全垒打率增加调查报告
Finally, much has been written in the media about the ball specications
being so large as to render meaningless claims that \the ball is being made
within specs." For example, with the current COR specications, a ball at
the upper limit (0.578) would have nearly 36 more feet of projected distance
than a ball at the low limit (0.514). Clearly, this standard is unreasonably
large, given that Rawlings achieves far greater precision in COR than is
communicated by that standard. For this reason, we have recommended in
the Executive Summary that MLB tighten this and other parameters of the
baseball that aect the game.
上限和下限的投影飞行距离会差到11公尺(36英尺)远，调查委
员会直接说这个公差范围是不合理的大(委员会调查了棒球工
厂的生产线，认为生产技术非常稳定)。