well I fire formed a pcs of 6.5x55 norma brass with 11gr of Bullseye and coffee and a pcs of cotton ball for plug. The primer is slightly bulged.

unfired brass in inches
base .4760
shoulder .4325
bottom of neck .2950
top of neck .2930
lenght .215 60

fire formed brass in inches
base .4760
shoulder .4550
bottom of neck .3080
top of neck .3025
lenght .214 95

Original cast with cerrosafe in inches after cooling
base .484
shoulder .457
bottom of neck .311
top of neck .300

original drawing of cast measurement in MM after cooling and where my measurement were taken on brass also