Quote Originally Posted by strut64 View Post
I started in march to tune up a 6 BR and have the following suggestions. Using 0.5 gr increments is too wide. Try 0.3 or so because you can miss a node. I found that using Berger 105 hybrids the best seating depth was a light touch, Not hard jam. I also found that neck tension built on successive firings with a conventional die. I now have a Redding bushing die. You must have a bullet comparator and a micrometer seating die. Half way through the process I had to start over due to pillaring and actin bedding The action
I do in fact have a bullet comparator and a micrometer. I got lucky and bought 1000 105g Berger Hybrids all in the same lot so I lucked out there and that is what I have been using. I have to admit, that Redding micrometer is the best I have ever used. I keep measuring though the whole series but I generally never have to readjust once its set.

Did you use a chronograph for to test your standard deviation or did you just measure your vertical spread?