Ever have your accuracy node not line up with your powder node?

[BradY]

The process stays the same except you just dont get that fine tune of your load at the end. Powder charge first, then seating depth... For years we have shot (f class Im talking) without tuners so we obviously can get very close or spot on loads developed without the need of tuners. Its just another tool in the box to use and like has been stated wont make a bad barrel shoot good, just an already good load slightly better (or worse depending on the tuner setting)

Another method I have seen is the barrel stretcher tube, supposed to increase the size of the accuracy node, again not making a miracle out of a bad barrel.

Both methods see some folks claim to just load to the velocity (not ES) they want then attempt to go pound the center out of the X ring at 1000yds. Not sure if that works for others but personally I would be starting to see what powder charge shot best, then on Eriks advice find what seating depth shot best for that charge, then go pound the center out of the X ring at 1000yds.

My tuner work has hit a bit of a hurdle. I went with too fine a thread and it cross threaded and is now seized on the barrel. Have to machine it off and start again. Its been an expensive and rather unproductive first foray into 7mm territory for me.

 

[stubbicatt]

This is just my unscientific hypothesis, but I imagine that in an accuracy node, the velocity dispersion is lining up with the barrel harmonics. This theory would make sense if the node is in the middle of the barrel's upswing (while it is flexing from down to up).

From what I have read elsewhere, the goal is to have the barrel at the end of its vibration node, not passing through the middle of its "swing", as the dwell time of the barrel at the end of a consistent vibration node is greater thus making it more forgiving of minor velocity differences.