I reload approximately 10,000 rounds per year for trap shooting and have recently noticed a change in AA hulls. The newer hulls have a separate base wad as compared to the old ones which are 1 piece compression molded. I have kept them separate and am only loading the old style currently. Does anyone know if the two hulls are interchangeable? Also I have been partial to 1 piece hulls as there is no chance of the base wad leaving the hull and getting lodged in he barrel. Any thoughts or reccomendations would be appreciated.