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col48, take a measurement of one of your loaded rounds just for curiousity.I talked to Dave,and while he didnt have the exact neck dia. spec Nesika uses,he was guessing .312-.315
Nesika usually makes thier guns to a match chamber but unless the customer specifies a tight neck,they have to chamber looser for what ever the customer shoots.To improve accuracy on thier guns Neskia will use a min. saami chamber spec with a tight throat.My guess that without turning your neck clearance is already .004-.005 and being as Norma is pretty uniform brass,thats why I said I wouldnt mess with it.Just for curiousity sake can you post the loaded neck dia.?
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i have the chamber drawing,but am unable to put it on hear.
a loaded round is .3085
if you send me a email i will send you the chamber drawing.
it is minimum saami speck