7 PRC Bushing Size? Adg Brass

I use 0.310 in an LE Wilson die for ADG brass, then run a polished LE expander mandrel to get about 0.0025" neck tension measured with a Burstfire gauge. 0.309" works better for Peterson brass which has thinner walls at the neck.

Edit: adding comment that bushings from LE, DAC, Redding, etc, will have different chamfer/lead in which may result in differing neck tension for the same given ID. LE Wilson is known for a short and sharper chamfer.
 
Back
Top