I finally got my Henriksen reamer in for my long awaited 6BRX. At the time I ordered it I wanted to run Sierras. Now I want to run Bergers since I have had great success with there bullets so far. I have .120" freebore. I see 3 Berger 105's on the books. Can anyone give me the bearing surface lengths on these three and which seem to be the easiest to tune. Will be for 600-1000 yarrs