Ammosmith Reloading YouTube Video +Question on Runout

[nevanevan]

I was looking for more information about runout. I came across this video below. When you avid reloaders measure runout, are you using total runout as in total deflection of the gauge, or total runout divided by 2 ie, 0.005 total runout/2=0.0025.

I am assuming everybody is going to say total runout as that would be the more accurate and picky way to sort cases based on quality. I tried to link the video to 3:37seconds but if not that is where my questions arrise. Thanks for the input!

 

[relic38]

That is an interesting way to sort brass, further than I'll probably go to sort brass.
As for the first measurement, it looks for runout in the neck, referenced to the body of the case.
What if there is an irregularity in the body right where it rests on the black parts he's turning it on? That would throw off the measurement just as much as a neck irregularity, right? I would think this would not contribute to accuracy issues as much as an actual neck runout. In other words, this measurement could lead to false rejection of otherwise good brass.
I understand that the body is the only reference point available for measuring neck runout.
I am just thinking it through though, since I'm trying to figure if a measured runout due to body irregularity is just as bad as runout due to a misaligned or irregular thickness in the neck.

Edit: to answer the question, I think he means to take the MAX measurement and subtract the MIN measurement, then divide that result by two. This gives you the actual runout.

 

[HIGHRPM]

I have learned a great deal from Ammosmith. Everyone has their own style so I try very hard not to criticize. I find him very knowledgeable, very easy to understand.

 

[nevanevan]

That is an interesting way to sort brass, further than I'll probably go to sort brass.
As for the first measurement, it looks for runout in the neck, referenced to the body of the case.
What if there is an irregularity in the body right where it rests on the black parts he's turning it on? That would throw off the measurement just as much as a neck irregularity, right? I would think this would not contribute to accuracy issues as much as an actual neck runout. In other words, this measurement could lead to false rejection of otherwise good brass.
I understand that the body is the only reference point available for measuring neck runout.
I am just thinking it through though, since I'm trying to figure if a measured runout due to body irregularity is just as bad as runout due to a misaligned or irregular thickness in the neck.

Edit: to answer the question, I think he means to take the MAX measurement and subtract the MIN measurement, then divide that result by two. This gives you the actual runout.

This is the question I'm asking, if most reloaders divide the total deflection of the dial gauge by 2

 

[hoochie]

Ive been reloading for about 10 years, and have never used the tools in the video. Ive never measured the runout, never turned a neck, never weighed my brass, never volume checked my cases.
Though I am a hunter and not a precision shooter, I get 3/4 inch accuracy out of standard hunting barrels, and have quite often been able to get loads to clover leaf.
Is it worth all the time and effort to prep the brass like they are a machined part, or have a higher quality rifle/barrel?
If you went through all this work and had a crappy gun, you probably wouldn't see the fruits of your labour. If you have a better gun, it may be more forgiving. In my case, 1 inch or less is all I need, and is easily achieved without all these extra steps, measurements and tools.
Your question was "do most reloaders..." I reload, and don't do any of it. I don't divide deflection, because I dont measured it.