Shotgun stuff

So santa came early in the form of a good bugger that I work with and now I have a 12ga loader on my bench.
Bit of a double edged sword this, as I ran my bucket of hulls through depriming/sizing, and found a bunch of brass at the bottom that needs sizing and priming too.
Works as advertised so now I'm going to give it a birthday with a toothbrush and brakleen, followed by a proper lubing.
So now I'm on the hunt for all things 12. I'd like a universal charge bar for the thing (mec 600) but for now I can just use what's in it, or hand-hand load the powder and shot. I have a bunch of #4, and the fulla gave me half a jug of #5.
First mission is a subsonic shot load, but soon to be followed by moulding slugs and working down a load for them. .70cal ball at 1050fps is just going to be all kinds of fun.
And I have an idea about a "do all" load...though not sure how effective it will be...few buck pellets packed in with sparrow shot #7 or so, and 'normal' shot #4, idea being you can point it anywhere and it'll do the job.
Oh, and I'm after magtech brass hulls for some BP fun aswell.
...and a shotmaker
...and I have ideas about an integrally supressed 20g, or .410.