Yes, they worked when I did my bit; I've been re-reading a little of WW Greener and a few others trying to glean thoughts on 10g loads; consensus seems - even for the BP era - to be on heaver shotloads and stiffer powder charges than mine. Mine are going through a 7lb single, so I can't get too ambitious, but I haven't got a 10g just to put 12g equivalent loads through it...