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Old June 06, 2019, 20:23   #1
gadzuke
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WIlson case gage dimensions?

I was under the impression that my Wilson 308 case gage was cut to SAAMI specs. When I measure the the depths of the headspace and case length grooves, they measure 0.005 and 0.010. Those are 223 numbers. 308 should be 0.007 and 0.020. Did Wilson screw up the run? Anyone else measure their case gage?

Last edited by gadzuke; June 08, 2019 at 05:13.
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Old June 08, 2019, 05:21   #2
gadzuke
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Got a partial and confusing reply from Wilson. It appears the dimensions are intentionally tighter than SAAMI specs so-as to reduce incidences of short chambers and long cases that both technically meet SAAMI specs but are incompatible. I have asked for clarification on their engineering dimensions.

Based on further measurements it seems the min/max dimensions are:

Headspace: 1.627 to 1.632 inches
Case length: 2.005 to 2.015

Measuring my case gage, it is actually 2.016 long. But I suspect manufacturing tolerances are +/- 0.001.
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