These are off a buck we call the King Buck due to the configuration.
My brother picked them up and gave them to my son Tyson.
The bases are 8 1/4" and 8 3/4".
not a cactus buck?! i would put money on it that it is. and yes cactus bucks shed. my friend shot one this year and an antler shed off in his hand. they tend to have big goofy bases like that and concaved.