Shotgun is NOT like metalic. You find a Published load using the shot weight charge you are wanting and velocity you are seeking. You use the Hull, Wad, Prime, ppwderr and charge and follow it EXACTLY.
You don't start low and work up. You use PUBLISHED loads only unless you are willing to spend the money to have them tested.
That's why I posted the Hodgdon link. Nobody here can give you a load for what you want without a TON of different info.
For what it's worth, I have handloaded close to 750K rounds in 410 -12 gauge. None of them have been from recipes taken off an internet forum but from a published manual (either paper or on-line).