Clay & Game Reloaders
here are good, based near Boston (Lincs) so obviously in the arrse end of nowhere.
The bloke is very helpful and if he doesn't knw it, then you don't need to. I believe he develops loads for the major manufacturers etc. He specialises in big bore and exotic non-toxic shot etc, and that brings up an important point. If you shoot No6 at pigeons or just clays then there is no way you are gonna even break-even by reloading 12bore. If you shoot less popular calibres, especially big bores (10, 8 & 4bore and 410) and or exotic loads (ITM, bismuth etc) then savings can be made.
I got a MEC 600Jr from him as you can get dies for 410 through to 12 bore for that press.