Dial Indicator question

Todd S · May 13, 2020

Question for all of you machinists out there. I have a dial dial indicator for a runout gauge. In the picture, the needle is on 0. If the needle deflects to the 5, is that .005”, .050”?

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H-Bar · May 13, 2020

Todd. Each line is .0005 so at the 5 it would be 10 lines = .0050

Atlasarmory · May 13, 2020

looks like .0005 per graduation so at 5 mark it would read 0.005 I think

H-Bar · May 13, 2020

Total measurement on that type of dial from zero to zero would be .030"

Todd S · May 13, 2020

H-Bar said:
Todd. Each line is .0005 so at the 5 it would be 10 lines = .0050

Thanks! That's the way I was reading it. I was getting less than .001in runout on my 6.5 neck, using a Redding body die and a Lee Collet Neck die. I think that's a pretty good combo.

Now seating is a whole other story. I have a Forster seating die coming, but my Hornady seating die is giving .004 to .006 runout on the bullet. It seems that the Hornady is inducing more runout from a pretty straight neck.

PowPow · May 13, 2020

Todd S said:
I was getting less than .001in runout on my 6.5 neck, using a Redding body die and a Lee Collet Neck die. I think that's a pretty good combo.

That's a keeper combo. :thumbsup:

I'd keep it....others will always say "but,"

Park ranger · May 15, 2020

You see .050" run out.

Major03 · May 18, 2020

Todd S said:
Thanks! That's the way I was reading it. I was getting less than .001in runout on my 6.5 neck, using a Redding body die and a Lee Collet Neck die. I think that's a pretty good combo.

Now seating is a whole other story. I have a Forster seating die coming, but my Hornady seating die is giving .004 to .006 runout on the bullet. It seems that the Hornady is inducing more runout from a pretty straight neck.

What kind of brass are you using?

My best guess as to the mystery of why you'd have so little runout on the neck prior to seating, and then a pretty significant change after seating...

Unless you uniform your necks by neck turning or reaming (or both), when you seat your bullet, it's then being effected by the variance in the neck.

It's not uncommon for brass to be as much as .002 or more off in thickness, which can translate into .004 or more of runout.

You could have a Forster Co-Ax single stage press and the best dies money can buy...but if you're brass isn't uniform you're just chasing your tail.

Todd S · May 18, 2020

I have neck turned the brass. I’m currently reloading star line brass.

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Seabee · May 19, 2020

I use the same method of sizing but only bump the shoulder .001"
Had the same problem with bullet runout on my Redding seater so I went with a Wilson hand seater and arbor press and runout now runs .001 with an occasional .0015. Never tried the Forster seater but heard good things about them.

PapiBarcelona · May 19, 2020

Park ranger said:
You see .050" run out.

Lol. It clearly says .0005" meaning each black line is .0005"

Dial Indicator question

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