Boyd Allen
Active member
I have never tried this method...have you? I TRIED IT story page 2
https://www.youtube.com/watch?v=TWmIwPwLyyg
https://www.youtube.com/watch?v=TWmIwPwLyyg
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The big flaw i see is he says its not based on "feel" like the old stoney point tool, but then it is based on "feel" on the bolt lift.
He never looks at the bullet for contact.
i'll pass.
i have no issues using steel wool polished bullets and magnification to find when i touch the lands.
You missed his point. The Hornady/Stony Point tool depends on you to push the bullet in until it contacts the lands, but when does that happen?. Anyone who has ever done this has experienced that mysterious point where he asks himself, "Is this just touching or should I push just a little bit harder"? The instructions for the Hornady tool even include a recommendation to use 3 or 4 pounds pressure. That's significantly more than the point where I can feel the bullet offering resistance. In other words, the tool requires a delicate "feel".
But the kind of feel the fellow in the post is referring to is either there or it's not. In other words, it's like a grain of sand in your eye. You can feel if sand is in your eye or if it isn't. You don't have to judge the size of the grain or the amount of pain. You either have sand in your eye or you don't.
The "release click" on the bolt is there when you're touching the lands and it goes away when you shorten the bullet a little too much; i.e. it clicks or it doesn't and since the click may be hard to hear, you measure it by feeling for its presence or absence. If you've been taking frequent CBTO measurements, as instructed, you revert to the last one and you now have the answer you're looking for.
If your polished bullets examined under magnification work for you, fine. I can say my Hornady tool produces results and I use them as a reference, but they're sometimes a bit vague, especially with high B.C. bullets and the repeatability is not as good as I would like. I'm gonna' give the "bolt click" method a try.
Good video and the best/good way I think to find that "length". What I'm trying to figure out is for what purpose would you ever need to know that?