W wwbrown Well-Known Member Joined Feb 17, 2011 Messages 153 Location minneapolis mn Feb 25, 2015 #15 This link goes to a forum on benchrest.com that discusses the bore rider and has a reamer print.
E Edd Well-Known Member Joined Jan 26, 2011 Messages 3,814 Location Tulsa Feb 25, 2015 #16 That's interesting. The throat angle starts out at about .5° and then changes to 1.5°.