>>The RCBS precision mic is an
indispensable tool for safe
and accurate loads that help
to extend the life of brass.
>>The precision mic measures
from the datum point on the
case shoulder to the base of
the cartridge giving the
reloader the exact SAAMI
tolerance readings.
>>Just a few twists of the
precision mic and the chambers
head space and bullet seating
depth to 0.001" will be
determined.