Question inside neck diameter.

[brstevns]

What is the norm for inside neck diameter. .003 less then bullet diameter?

[243winxb]

Some expanders are only .0015" smaller than bullet dia. Some handguns, as much as 4 thou. Under bullet dia. . Measure the neck, before and after seating a bullet. If seating expands the necks .002" , you have average neck tension, around 40 lbs.