Lapua 6mm BR brass comes with PPC-sized flash holes - they measure 0.058-0.059".
Regular brass, like .223, .308, .22-250, etc. comes with 0.080" flash holes.
IIRC 'regular' decapping pins measure something like 0.060" - I don't recall what size PPC decapping pins are.
Obviously, sticking a 0.060" pin in a 0.058" hole isn't going to work very well
My PPC flash-hole deburring tool / reamer (from Russ Haydon's Shooters Supply, great folks) opens them up just a fuzz, to ~0.062".
While technically a 'regular' pin should now fit (and usually does), the least little bit of carbon buildup in there will bind things up. On Redding dies like their Type 'S' F/L bushing die (highly recommended), it will pull the pin right out of its little collet holder in the decapping stem as it does not have a shoulder on it like other brands do.
Extra decapping pins - including 0.057" 'undersized' ones - are available in packs of 10 from places like Midway USA.
HTH,
Monte
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