RCBS Precision Mic .270 Winchester

The RCBS Precision Mic for .270 Winchester is a reloading instrument that measures chamber headspace and bullet seating depth to 0.001-inch accuracy with just a few twists. It reads from the datum point on the case shoulder to the base, giving spot-on SAAMI tolerance measurements for .270 Winchester cartridges.

These readings help reloaders create safe, accurate loads and extend rifle brass life through proper measurement. The tool is built for reloaders who need consistent ammunition that meets exact SAAMI specifications.

Key Features

Highlights

• Measures chamber headspace and bullet seating depth to 0.001-inch accuracy
• Reads from the datum point on the case shoulder to the base
• Provides spot-on SAAMI tolerance measurements
• Helps create safe, accurate loads
• Extends rifle brass life through proper measurement

How to use

Insert a fired case into the Precision Mic and turn the micrometer thimble to take a headspace reading from the datum point on the shoulder to the base. For bullet seating depth, use the tool with a loaded round to determine the distance to the rifling. Adjust your reloading press accordingly.