Rick,

Joelkdouglas posted on 24 hr in 2012 mentioning this reamer:

http://www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/6633736/Re_PTG_Bolt

I have found the 1.5 degree throat angle works well with most bullets and it seems to work better with Berger vlds.

Ross