How important is it to keep the bearing surface in front of the neck shoulder junction (NSJ)?
I've read it's to prevent a doughnut from effecting neck tension. If sizing with a mandrel or expander, does that push the doughnut to the outside avoiding the issue? I could see a bushing die pushing the doughnut in but then they don't size right to the NSJ.
I'm mapping out a 7 SAUM for the 180 VLD. With the bearing surface right at the NSJ, it has an expected COAL of 2.97". I would think the bullet needs to be 20 to 30 thou up from the NSJ to avoid a doughnut. 30 thou of seating one way or the other appears to have a insignificantly change in case capacity.
I've read it's to prevent a doughnut from effecting neck tension. If sizing with a mandrel or expander, does that push the doughnut to the outside avoiding the issue? I could see a bushing die pushing the doughnut in but then they don't size right to the NSJ.
I'm mapping out a 7 SAUM for the 180 VLD. With the bearing surface right at the NSJ, it has an expected COAL of 2.97". I would think the bullet needs to be 20 to 30 thou up from the NSJ to avoid a doughnut. 30 thou of seating one way or the other appears to have a insignificantly change in case capacity.