The Lee is fine for field loads. I would not really consider it the best choice for steel or 3" loads. Slugs will probably require a roll crimper (available from Ballistic Products). Lee makes a slug mold designed for a standard wad and fold crimp. I hear mixed reviews on this slug. I use a Lyman 7/8 oz foster slug mold and roll crimp with very good results. I also cast my own buckshot and load using Winchester red wads or filler wads from BPI.
And I use a Mec loader for 12 ga. I use a lee load all II for 20 ga
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