GMinor Wrote:Why .310? Thats a weird choice.
I ordered a Harrells brake, and am having it opened up to .284, which would be .020" over bore.
I have a Recoil Eliminator from JP and they say "RECOMMEND A MINIMUM OF .040 OVER BORE DIAMETER FOR THE FINAL EXIT HOLE."
http://www.jprifles.com/document_pdfs/JPRE9BT_532.pdf
I had my Machinist do this for me on my .50 Beowulf and worked fine and helped a tremendous amount. I also used the same measurement when enlarging comp's for the Grendel.
