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Gives accurate, comparative readings on actual barrel throat erosion for all M1, M14 and M1A .30-06 and 7.62mm Nato, High Power Service Rifles. Insert in empty chamber and take reading every 1,000 rounds to accurately measure and track barrel throat erosion.
SPECS: Steel. Approximately 4" (10cm) long. Includes .30-06 and .308 chamber spacers and complete instructions.
Catalog page 474
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$62.50
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