Has anybody else read this thread on the above topic?
http://benchrest.com/forums/showthread.php?t=68145 It is time consuming but has a few good bits in there, more towards the end of the thread.
It has a lot of info on tuners and how it relates to tracking temperature and density altitude.
The question is, have any of you bothered to track density altitude? For example, at Rosebud our density altitude in the summer would be about 7000', whereas in Tacoma, WA it would be more like 1000' or less. According to the people in the thread that would really throw the tune out the window. Over the course of a day you could easily see the DA vary 1000-2000' from a cold morning to a hot afternoon
Has anybody taken the steps to track this and deal with it according to previously recorded DA readings and powder measure settings?
Another good tidbit in there is that nodes for the 6PPC are about 1.2 gr apart, according to Beggs. Could it be so simple to move up or down .6gr to get a rifle in tune, when you know it is for sure out of tune?
And you thought you had nothing to think about this weekend!