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Old 11-18-2012, 01:14 AM   #8691 (permalink)
MorueM
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Join Date: Mar 2008

Proper oring grooves is kinda wide, as per some oring standards. What should help a lot here is bigger radius in the bottom corners of the grooves. Sharp corners is a fail point in the making, regardless of the material. Just saying, if a rounded groove tool was used instead of a squared groove tool, I bet there would be less breaks at oring grooves.
Then again, my Thumper has a steel main piston, and breech/barrel breaks paint, but works, until now.
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