Grading a Caliper

[cwebster]

You can make calipers read about anything you want........

 

[Rocketvapor]

You can make calipers read about anything you want........

Here is a CHEAP Dial Caliper.
Very LIGHT pressure on thumb wheel, very HEAVY pressure on thumb wheel.
ALMOST a whole thousandths difference.
Something tells me FEEL plays a part in this

 

[JimSC]

Like most things involved with precision reloading my opinion is precision is more important than accuracy. I use my automotive feeler gages to check my calipers. Works good enough for me but then I am a 195 - 197 shooter not a 199 -200 shooter. If a base to ogive is .00110 or .00099 will it redally affect my shot that much at 1000 yards? Every shot erodes the throat a little, does anyone do a new seating test after every match and chase the throat?

 

[JimSC]

You can make calipers read about anything you want........

you can make a precison micrometer vary quite a bit if used incorrectly. That is why they have a rachet stop which limits the amount of torque that can be applied to the thimble

 

[Rocketvapor]

Maybe a decimal error there,
"If a base to ogive is .00110 or .00099"
that's +/- one tenth.
With Calipers?

 

[JimSC]

Maybe a decimal error there,
"If a base to ogive is .00110 or .00099"
that's +/- one tenth.
With Calipers?

.00110 - .00099 = .00011 or eleven ten thousanths according to my math

Place Values After the Decimal Point

Point is all the precison in the world at the reloading bench won't help wind calls or improper follow through. Wind reading and range sessions to work on technique requires is a lot more work than pulling out the credit card

 

[Rocketvapor]

We've beat the caliper accuracy thing to death.
I'm sure the OP has all the info he needs.
Time to start on things that really matter.

eleven thousandths 0.011"
eleven ten thousandths 0.0011"
eleven 100 thousandths 0.00011"

 

[JimSC]

We've beat the caliper accuracy thing to death.
I'm sure the OP has all the info he needs.
Time to start on things that really matter.

eleven thousandths 0.011"
eleven ten thousandths 0.0011"
eleven 100 thousandths 0.00011"

correct, sorry I am old and easily confused

 

[Greg@wfcustom]

correct, sorry I am old and easily confused

I started out confused then I got old!

 

[JimSC]

I have hit the stage where I find myself staring blankly into the refrigerator wondering what I am looking for and hoping it isn't my truck keys.

 

[6MMsteve]

I have hit the stage where I find myself staring blankly into the refrigerator wondering what I am looking for and hoping it isn't my truck keys.

yep I went upstairs trukin along then I stopped went back down

 

[jk80]

---

Jackie's comment is spot on!

Calipers are great for quick measurements within a thousandth or two. Good for short, or small diameters. Bigger diameters, or llonger length need 8 inch or 12 in calipers etc. Most use calipers , because they will get close measurements, in many different lengths, diameters, or depth. Replacing micrometers of different sizes.

Learned how to read Vernier calipers & 6 / 12 incn scales when I was 14 or so. Same way with standard micrometer. Along came dial calipers, never saw digital measuring equipment till aircraft work.. Only reason they had digital equipment was for the younger generations, that could not read standard micrometer or calipers.

Only reason for me today to have digital anything is I don't trust my " OLDER " eyes.

To all a good day!

Man do I know how that is!! Went to digital when my eyes started going. Welding can be rough on the old eyeballs!!

 

[Greg@wfcustom]

I have hit the stage where I find myself staring blankly into the refrigerator wondering what I am looking for and hoping it isn't my truck keys.

I have more and more of what I call lab (Labrador) moments. I walk into a room and look around wondering why I came in there!
Have a great evening!
G

 

[Retired shooter]

---

Man do I know how that is!! Went to digital when my eyes started going. Welding can be rough on the

I have more and more of what I call lab (Labrador) moments. I walk into a room and look around wondering why I came in there!
Have a great evening!
G

That's called " Experiencing the here after" you look around & say " what did I come here for"

 

[std7mag]

Ya wanna talk technique.
Don't forget these bad boys.
Inside dial calipers.
Co-worker calls them Guesstimaters.

inside dial calipers - Google Search

 

[bobo300]

I've used Brown &Sharp for 35 in machine shoos. Served me well

 

[PhilC]

yep I went upstairs trukin along then I stopped went back down

Have reached the point I occasionally head to my shop to get something and forget what halfway there, usually remember halfway back to the house...

 

[Infrequent Shooter]

Don't have a lab at home but I do know how to adjust calipers and mics at home using standards. No two people using my mics and calipers. Just me.

is standard the same as gage block?

 

[Infrequent Shooter]

We've beat the caliper accuracy thing to death.
I'm sure the OP has all the info he needs.
Time to start on things that really matter.

eleven thousandths 0.011"
eleven ten thousandths 0.0011"
eleven 100 thousandths 0.00011"

Rocketvapor is one of my heroes on this site.

 

[STORM2]

Just when I thought we were on the trail of the cause of the Hubble lens error, the search gets called off!