Outstanding reference on OCW. Don't agree with his opinions about federal but that's what makes for good discussions. Also, doesn't the bullet try to straighten out the grooves causing a twist harminc to the barrel that goes beyond the simple first order sound wave bouncing from end to end? I love the physics of ballistics
Haha, you are way beyond me too!
However, It seems to work for me. Out here on Oahu the public facility only has 100 yards easily accessable for load devolpment. Thus Dan's method suits my purpose to a tee.
I have also read much about the theory you are speeking of, in that there are many shock waves effecting the barrel as the bullet leaves the muzzle. I am still on the fence as to relationship of bullets to the lands theory of tuning and the notion that it is actually the pressures that need to be 'just right' for the bullet to leave the muzzle at that certain point where vibration is null.
I do shoot a load with the bullet jammed a little ways, and I have a load where I have tuned using seating depth and jumping to the lands. Both shoot equally well.
Here is some groups on the load I had settled on for the 95grain SMK's.
All groups shot at 100 yards prone with a bipod.



Hope this works out for the 300 yard line at Puuloa!