I have had my detachable clip on my rem 700 drop out occasionally during the shot. I have checked out both clips and the tolerances are tight. My 300WM recipe is: RWS 1x fired brass 78.9 gr H1000 powder CCI BRII Large rifle primer Berger 190 gr Hunt VLD Ogive .020" off lands, 2998-3002fps out of a Bartlein 24" 5R barrel. No pressure signs on extraction, spent primer or at case head. The Hodgdon manual says 81.0 gr of H1000 with a 190 gr bullet gives 2990fps with 52,800 CUP pressure. I believe CUP max for 300WM is 64,000. Am I shooting an over-pressure load? What do you guys think?