Dasher brass fire formed to 1.55

[WIB3]

I always trim, expand and form a false shoulder. The OAL of the case is redundant. Mine always seem to be around 1.535 ish. They grow in length through firing. They are not really ready for competition until after their 3rd firing. Although, some people have had success with the second firing.

 

[WIB3]

Many who fire form and not hydro form have a detected rifle to do just that. It’s best to do in the cold winter months to keep your barrels cool.