The RCBS Precision Mic for .270 WSM (RCBS part no. 88315) lets handloaders determine chamber headspace and bullet seating depth to within 0.001 inch with just a few twists. It measures from the datum point on the case shoulder to the case base, giving spot-on SAAMI tolerance readings that a standard caliper can’t match. For reloaders chasing safe, accurate .270 WSM loads and longer brass life, this tool takes the guesswork out of headspace and seating depth measurement.

Key Specifications

• Measures chamber headspace to within 0.001 inch.
• Measures bullet seating depth to within 0.001 inch.
• Reads from the datum point on the case shoulder to the case base for SAAMI-accurate tolerances.
• Built specifically for the .270 WSM cartridge.

Frequently Asked Questions

What does the Precision Mic measure? It measures chamber headspace and bullet seating depth to within 0.001 inch, referenced from the datum point on the case shoulder.

Why does headspace measurement matter? Accurate headspace readings help you set up dies correctly and extend the life of your .270 WSM brass by avoiding over-sizing.

Buy the RCBS Precision Mic.270 WSM

Dial in safe, accurate .270 WSM handloads with a tool built for SAAMI-precise headspace readings. Order it from our Lubbock, Texas gun shop, where our gunsmithing tools selection stocks precision measuring tools for handloaders, with fast shipping to your door.