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Old August 1, 2011, 08:03 PM   #40
Senior Member
Join Date: July 26, 2011
Location: USA
Posts: 1,614
Bullet Setback on Loading will Raise Pressure.

In fact i can squeeze the loaded round and shove the bullet into the case.
This is a neck tension problem. The Fl die is not sizing the brass down enough or the expander is to large. The expander should measure .450" Using mixed range brass can also cause it. Different case wall thickness. With Unique, there may be less set back because the powder stops the bullet from traveling to deep in to the case. Not so with Bullseye or 231 powders.
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