Lads to answer your questions I have used CLP, engine oil, Boretech, collings solvent all of them affected the first shot in the same way. Bore was always wiped clean prior to firing but to no avail.
As Dogmatix stated wiping the bore clean with an oil neutralising solvent worked wonders, it brought the first cold shot right down to where it should be. Problem solved cheers @dogmatix legend.
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