Thanks guys.
They are pure lead, there might be just a touch of tin from the thin layer of lead/tin I use for buckshot that I leave in my pot. Lee recommends pure lead.
Lee provides load data. I am running into a small problem as it dosent all seem to fit in the hull.
One of the recipies Lee gives is
Win AA hull
36 grains of Herco
WAA12 wad
Win 209 primer
I ordered wads and had everything else. Put it all together and they don’t quite crimp right IMO. I might be too picky but the crimp isn’t closing and I can see the slug through a hole left in the middle of the crimp. One of the tricks to the Key slug is to put a 1/8th nitro card under the slug so the wad doesn’t get pushed into the bottom of the slug when fires from a smooth bore. With a card the crimp really sucks. If I put 50lbs of pressure to the wad when seating it with the press the crimp looks better but I think I am just crushing the wad leg down and I don’t really want to do that too much….the Alliant Herco is taking up a ton of room in the hull. I have made a couple with reduced charge to see how they shoot, they crimp better.
I am going to try a recipe with Accurate #5 next.
I have about 4000 rounds worth of pure lead and another 50 lbs of lead tin mix so It should last me a long time….finding it hard to get out and shoot the last couple of weeks and tomorrow I am getting my puppy so I'll be extra busy for the next few weeks.