quote:

Originally posted by bartsche:

quote:

quote:
Precision steel calipers are generally considered accurate to +/- one thou tools but most are half that, or better.

TRUE
BUT
FG,
It depends on technique (skill) and what you are measuring.
TRUE
JMHO and what I believe can be achieved using known dia. drill blanks and Jo- blocks, a good dial caliper can yield accuracy at + or- .0005". For the average reloader this should be totally adequate. Digitals and verniers are "somewhat" different.
roger

Roger,
You hit the nail on the head. For COMPARATIVE measurement you can get more accuracy. So if you wring a set of gage blocks together for the length that you want and measure that with a caliper then measure the part you are working on you can get much higher accuracy.
And you are right, technique and practice play a hugh role, especially with a caliper. But anyone who thinks they can get less than .001 accuracy out of a caliper is fooling themselves.

never thought this would go 2 pages

I read something about a "gauge block", do I need one of these or can I use my feeler gauge in my garage?

thanks

I have a very high qaulity one, but for reloading I never used it...

The "Meßschieber" is good enough for reloading!