I used good scientific method gathering this empirical data. Problem is, it's not representative of anything but the tiny samples I tested. Sorta like, I can absolutely swear that one blade of grass in my lawn is 3" long and one is 4" long. However, from that data, I can't surmise whether your lawn needs to be mowed.
It was fun to do and it's one of those things that make me say hmmmmm.
#7.5 shot / Relative Hardness
Lawrence Magnum =100
Eagle Magnum =97
Federal Premium Flyer= 95
B&P F2 Mach = 92
Remington Nitro 27's =91
Federal Gold Medal Paper =91
West Coast Magnum = 91
Lawrence Magnum Copper =87
Winchester SuperSport =84
Federal Premium Field Copper =77
Fiocchi Nickel Little Rhino =74
Remington Nitro Express =73
Winchester Black Diamond Nickel =70
Gamebore White Gold Nickel =68
Remington Game Load 16ga =68
Fiocchi (Italy) HV Field =68
