Few more measurements:

Again, Mag Box: 2.850"

To Lands:
136 Lapua Scenar-L: 2.885 COAL (2.215" BTO)
130 Nosler AccuBond: 2.815 COAL (2.205" BTO)
130 Berger VLD-H: 2.950 COAL (2.195" BTO)

Horn. Factory 140 Amax: 2.820" COAL (2.140" BTO)... this is approximately .065" off the lands in my rifle
Win. Factory 140 HPBT: 2.820" COAL (2.165" BTO).... this is .050 off the lands in my rifle

You better pray to the God of Skinny Punks that this wind doesn't pick up......