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mehavey · October 24, 2011, 05:56 AM

Take a look at this article/analysis about 60% down the page for an analysis of a 50,000psi 243Win cartridge.
"Summary Table with Estimated and Measured Coefficients of Friction"

http://www.varmintal.com/a243zold.htm

I'm not sure how much of the lubed case = dangerous bolt thrust concept is real, and how much is tradition. But this analysis (and the tests that are hyperlinked) would say it is relatively small (~4-6%). Countering that thrust increase is the reduced stress on the brass/case stretch

Anyone else have more data/other tests (maybe even a strain gauge on the bolt/lugs somehow)?

October 24, 2011, 05:56 AM	#7
mehavey Senior Member Join Date: June 17, 2010 Location: Virginia Posts: 6,896	Take a look at this article/analysis about 60% down the page for an analysis of a 50,000psi 243Win cartridge. "Summary Table with Estimated and Measured Coefficients of Friction" http://www.varmintal.com/a243zold.htm I'm not sure how much of the lubed case = dangerous bolt thrust concept is real, and how much is tradition. But this analysis (and the tests that are hyperlinked) would say it is relatively small (~4-6%). Countering that thrust increase is the reduced stress on the brass/case stretch Anyone else have more data/other tests (maybe even a strain gauge on the bolt/lugs somehow)? Last edited by mehavey; October 24, 2011 at 06:52 AM.