Breech Block Failure 1916/1920 Erfurt

Mark1 · 01-26-2021, 07:09 PM

Hi Allen,
You are on the right track. If your measurements are accurate, a headspace of 0.768" is well within the SAAMI range, although a little over the CIP standard. Regardless, the pistol should be safe to test fire and then examine the fired cases for any problem. If there is an issue, I'd recommend you send the gun to GT for a close inspection.
Use of tape discs on a sized case head is an acceptable method of checking headspace, if the accuracy limitations are understood. I regularly use this method for obsolete calibres where any standard gauges are unavailable.
Mark

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01-26-2021, 07:09 PM	#1
Mark1 User Join Date: May 2008 Location: New Zealand Posts: 72 Thanks: 332 Thanked 74 Times in 25 Posts	Hi Allen, You are on the right track. If your measurements are accurate, a headspace of 0.768" is well within the SAAMI range, although a little over the CIP standard. Regardless, the pistol should be safe to test fire and then examine the fired cases for any problem. If there is an issue, I'd recommend you send the gun to GT for a close inspection. Use of tape discs on a sized case head is an acceptable method of checking headspace, if the accuracy limitations are understood. I regularly use this method for obsolete calibres where any standard gauges are unavailable. Mark