Micrometer recommendation for barrel slugging?

[Hossfly]

Amen to that. I don’t buy anything that has a life time warranty. Cause I wonder who’s life time is covered by it.

[cuzinbruce]

If you shop around a bit, you may be able to find good B&S, Starrett, Mitutoyo mikes used for not outrageous prices. I don't have one that I bought new. Just have to look at them, turn them, etc, to see which ones haven't been abused.

[EDG]

The ridges of the bullet are all that you really need to measure with a micrometer.
The hole in the barrel can easily be gauged with a set of .001" increment pin gauges.

Or You can mike the grooves of a bullet with a blade mike if they are even numbered.
Odd numbered grooves require a different measuring process beyond the knowledge of most home hobbyists.

[John Boy]

43 posts about micrometers measuring to 0.0001" +/- 0.0001 for land/grooves...
When only standard measurements are x.xxx

[EDG]

Please define what you think are standard measurements.
When possible gauging limits are supposed to be 1/10 the precision that is required.
If your precision required is plus or minus .001 you micrometer should be capable of plus of minus .00010.
This is standard practice for calibrating gauging equipment that will be used to accept product that will be sold through commercial channels in the US. When 10 to 1 is not really possible due to extreme tolerance requirements a 4 to 1 ratio is deemed acceptable.

43 posts about micrometers measuring to 0.0001" +/- 0.0001 for land/grooves...
When only standard measurements are x.xxx

[tankgunner59]

I too use a vernier mic and I believe they are much more reliable than digital. If you don't know how to read it you can check here and you can find youtube vids that explain it. Once you learn how to read it it's pretty easy to remember.

The only digital measuring device I have is a caliper, but it's for non-critical measurement, I also have a dial caliper that is my go to.