Several people mentioned sorting your bullets by bearing surface. I don’t know if I want to do that or not, but I would like to learn how you are measuring that.
Sorting Bullets
- Thread starter gilream
- Start date
Ned Ludd
Silver $$ Contributor
One way is to use two caliper inserts at the same time. Depending on the type/brand of inserts used, it's questionable whether that is really an "accurate" measure of bearing surface length, but it may be sufficient for sorting purposes. The closer the diameter of the caliper insert holes are to caliber, the better the measurement will be.
If there's enough difference in the bearing surface, it can make a difference as I found it did with ~.034 spread . . .
Check out post #7 & #13 for a demo pic. Your basically checking the run out on the barring surface of the bullet, for run out on a concentricity gauge, set up for just the bullet. Keep in mind, that with VLD and Hollow Point bullets that, the bigger issues is with the Metplat. You can have a perfectly squared barring surface with a damaged Metplat also.. Check out SensorTube on this subject, there were some good video on this subject. Provided that they have not been demonized yet. There should be several threads here on Accurate Shooter in the archives also. I'm hoping someone with more of an insight on this subject, chimes in. I just check the ones that stand out when I'm sorting by CBTO and weight. With the way that the Sinclair Bullet Sorting Stand works... If there is a bullet that is bent, it will show up on the Dial gauge. Just my findings on my experiments
that I have done. I hope some one else, has a better way of doing it, and they have been keeping it a secret.
I by far, do not have all the answers, and I'm here to learn also. So, some one with more experience on this subject, Please, now is the time to let it all out.
Edited 01/22/2021:: Post #7 pic is showing the measuring of the barring surface on the Sinclair bullet sorting stand.
Post #13 pic is showing the Neco checking bullet run out on the Barring surface for out of roundness.
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Agreed, some people forget that it is just a reference point. For each Reloader, it boils down to his measuring sticks and his comparators, and Scales.
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It's good to see that I'm not the only one that has mad methods. Great job, Sir
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