[Unclenick]

Sorry, I wasn't clear. I meant only that CCI didn't achieve the reduced military sensitivity (as compared to the regular 450 primer) by making the 450 cup thicker. I suppose the thicker cup in the 450 as compared to the 400 would reduce its relative sensitivity if the priming mixes were the same. However, Alan Jones said that in 1989 they (he worked at CCI) altered the magnum priming mix to better ignite the spherical powders available then (mostly the ST. Mark's Powders Western Cannon series sold in canister grade as Hodgdon and Winchester spherical numbers). So I don't actually know how the 400 and 450 sensitivity compare in an H test due to the formulation difference adding a variable. The thicker cup will have better pressure deformation resistance, for sure.