Hi, I reload .410 with Hodgdon 110 with up to 21grm lead too which I put through the Birmingham proof house which I have to say that they are great people there. Anyway, I use Fiocchi hulls which are primed already but when reloading them (replacing the primers) I use cx2000 or cx50 they both seem to work fine 14.5 grains of H110 and with 7.5 lead in at 19.5 grms they break clays at the same range as a 12bore. Why shouldn't they? Its not the gun its what comes out of it and is a product of mass(weight) times velocity so if you fire a 7.5 lead pellet at the same speed out of the barrel as a 12 bore it will do the same job. So many people say its out of range for a .410 that is not correct, failure to break clays in a .410 is more likely down to bigger gaps in the pattern due to the reduced load of lead (compared to a 12 for instance )at a more distant range.
