Originally Posted by REDHEAD
You will find yourself owning several over the years. They don't servive a drop test well. LOL
Mechanically driven (analog) jaw calipers don't and neither do dial indicators (mechanical) if cheaply made. High end ones do because they are manufactured with shock abrorbing internals. I've dropped my LSS analog jaw calipers before with no issue. Moisture is another story, That's a big no.
The digital IP rated jaw calipers and AGD round face dial head, because the only moving part is the stem (all internals are solid state) survive impacts and high 'G' shock loads without any issue and most are either encapsulated or 'o' ringed so moisture isn't an issue either.
I use a high end digital indicator in a flood, water based synthetic coolant application on a CNC machine and the indicator is in the cutting area all the time, bathed in coolant spray, with no issue whatsoever.
You get what you pay for.
I believe the RCBS Jaw Calipers are Fred Fowler badged RCBS.
Cabelas offers them as well as Starrett. So does Midway, Natchezz and most of the online gun supply retailers.
Really the best place (and best price) to get any caliper or round head indicator is a machine tool supplier like MSC. They will have a mind boggling selection whereas, the gun supply retailers only have a limited selection.
For firearm/reloading use, howver, a thousands indicating 0.001 instrument is all you need.