Why not start at the short end and let the barrel grow thru the node? Seems like you may never have to adjust seating depth that way? Maybe I'm looking at it wrong?
who is that guy ?The concept is to find the lands when the barrel is new and back off to find the node. Once accuracy starts to deteriorate, normally seating two or 3 thousandths longer will bring accuracy back safely.
J E CUSTOM
who is that guy ?
Your explanation JE is better than his.
Looking forward for your video !!!!Like most, I have a different method and philosophy to reach the desired seating but both ways shone will get you there fairly accurately. I do have different requirements than some, and have reasons for these requirements.
I rely on true measurements not feel. The instruments don't lie or have a reason to.
First, I don't use a bullet more than once or twice for any measurement that applies force of any kind because it can deform the bullet slightly and give false readings. (When you jam the bullet in the chamber using the bolt some deformation of the bullet jacket will take place. Although slight, it is still not representative of the new bullets in the un-fired form. For true accuracy, the base to Ogive must be measured on each bullet. If these dimensions vary, problems can occur if the bullets are jammed into the lands because of the differences bullet to bullet. Most methods will get you off the lands for safety, but How much, is what I am looking for.
Like many things in this sport, very few agree on everything or every aspect of someones method. most methods shone will keep you off the lands if measured/performed properly as in the video.
I rarely agree with everything on most videos, but many have merit and can help someone just getting started.
I am trying to put together a video my self on this and show the method I prefer to use that can/will give me precise measurements with each type of bullet that will be used in a particular rifle/chamber and record all of the measurements for that chamber. I find that if I do a better job of measuring in the beginning, it is easier to find that accuracy node.
The one thing that I definitely don't ever do is jam the bullet into the lands and prefer to not touch them ether because of the slight differences in bullets. I find that if best accuracy is in this state, changing the load can/will solve this and keep you much safer and trouble free.
Being off the lands is the safest, how much is an individual thing. In many cases this kind of precision loading is/may not be necessary or even measurable for some, so take it for what it is worth. If I can squeeze .010 thousandths more out of a load, I will but in many cases it is not necessary, so as long as the load performs for the type of use intended, some of these exact measurements will not be required, But for pure accuracy, leave no stone un turned.
J E CUSTOM
Yes, the dowel & being able to feel the bullet meeting the lands works well for me too. It is repeatable.I use the Hornady tool with modified cases. It works perfect when using a wooden dowel rod, pushed in from the muzzle till it touches the bullet tip. You can work the bullet back n forth feeling the bullet "touch" the lands and also jam into the lands. Then measure OAL.
ITS SO SIMPLE.