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In looking at the SAAMI cartridge and chamber drawing for 270 Winchester, the case length is given as 2.540-.020. I'm not experienced in reading engineering drawings, so does the -.020 mean a tolerance of +/- .020, or minus .020 for the minimum length? Thanks
Increasing my post count so people will buy stuff from me
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Campfire Tracker
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It means the length should be 2.52-2.54 so2.52 min to 2.54 max.
I am continually astounded at how quickly people make up their minds on little evidence or none at all.
Jack O'Connor
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Campfire Regular
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Campfire Regular
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The former. It's not +/- 0.20".
2.540" would be the maximum length where as 2.520" would be the minimum length. The "trim to" length is typically the maximum length - 0.010", or 2.530".
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
― Patrick Rothfuss, The Wise Man's Fear
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