wm460
Member
I am trying to expand a neck of some .308 and 30.06 cases from 7.95mm to 9.25mm internal Dia.
I have tried heating the necks with propane gas torch, I pushed a metal insertion tool into the neck till the mouth is the right size. Then tried to expand the rest of the neck with transfer punches, working my way up with various sizes still using the gas.
Problem is the last two punches always get stuck in where the neck meets the shoulder and it crumples the shoulder.
What can I do to avoid this problem?
I have tried heating the necks with propane gas torch, I pushed a metal insertion tool into the neck till the mouth is the right size. Then tried to expand the rest of the neck with transfer punches, working my way up with various sizes still using the gas.
Problem is the last two punches always get stuck in where the neck meets the shoulder and it crumples the shoulder.
What can I do to avoid this problem?