How to read a Lyman vernier micrometer???

cpileri · March 1, 2002, 05:47 AM

I am holding a Lyman Vernier (the manual one, not digital or electronic) Reloader's Micrometer, and have it set exactly correctly upon a .458 Barnes Solid slug.
For the life of me, it measures .457.
IS that right?
or am i reading it incorrectly?
The directions are not too clear on the package insert. Can anyone help me to read the thing????
Its easy to get to .45 (i.e the hundredths of an inch place, the .00 point), but the thousandth and ten-thousandths of an inch (the .000 and .0000 place, the "8" in .458) i am confused on as the numbers are sideways and no big arrow points clearly to a "read here" line.
Thanks for your help.
Carl

**Mike Irwin** · March 1, 2002, 11:36 AM

A difference of .001 in a mass produced rifle bullet?

HEAVEN FORFEND!

I'd say yes, you're reading your micrometer correctly.

Steve Smith · March 1, 2002, 11:45 AM

Ok, frst of al, its not unusual for a bullet's diameter to vary a little. However, you might not be reading your micrometer correctly, either.

I recently had a need to use my vernier micrometer, rather than my dial calipers, and went for a search on instructions...

I found this:

http://www.umeciv.maine.edu/cie111/equip/micrometer.htm

I hop it helps you as much as it helped me. The .0001" verier lines had me cornfoosed.

March 1, 2002, 05:47 AM	#1
cpileri Senior Member Join Date: December 24, 2001 Location: Peoples Republik of Maryland, Sister State to Kalifornia Posts: 619	How to read a Lyman vernier micrometer??? I am holding a Lyman Vernier (the manual one, not digital or electronic) Reloader's Micrometer, and have it set exactly correctly upon a .458 Barnes Solid slug. For the life of me, it measures .457. IS that right? or am i reading it incorrectly? The directions are not too clear on the package insert. Can anyone help me to read the thing???? Its easy to get to .45 (i.e the hundredths of an inch place, the .00 point), but the thousandth and ten-thousandths of an inch (the .000 and .0000 place, the "8" in .458) i am confused on as the numbers are sideways and no big arrow points clearly to a "read here" line. Thanks for your help. Carl

March 1, 2002, 11:36 AM	#2
Mike Irwin Staff Join Date: April 14, 2000 Location: Northern Virginia Posts: 41,642	A difference of .001 in a mass produced rifle bullet? HEAVEN FORFEND! I'd say yes, you're reading your micrometer correctly. __________________ "The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza Baby Jesus cries when the fat redneck doesn't have military-grade firepower.

March 1, 2002, 11:45 AM	#3
Steve Smith Senior Member Join Date: December 9, 1999 Posts: 4,131	Ok, frst of al, its not unusual for a bullet's diameter to vary a little. However, you might not be reading your micrometer correctly, either. I recently had a need to use my vernier micrometer, rather than my dial calipers, and went for a search on instructions... I found this: http://www.umeciv.maine.edu/cie111/equip/micrometer.htm I hop it helps you as much as it helped me. The .0001" verier lines had me cornfoosed.