No, you set your seat die to factory OAL using a GP11 cartridge and seat all to the spec thus produced.
The Swiss did a lot of playing around with bullet and charge before finalizing the design specs. Any improvement you can get will be trivial. Try your luck.
K31s shoot better than we do.
Last edited by kilimanjaro; July 28, 2014 at 11:03 AM.
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