Howdy Pard!
I don't cast em, but my bro does for me....He uses a lyman mold, .452 for .45 Colt, and i do the lubin and sizin.
I use LEE Alox lube, and i size em in a cheap LEE press usin their sizin kit, (bout 20 bucks). The alox may be a bit messy at first, but ya let em dry overnight, and it does a superior job of lubin your boolets. I have had NO lead build up in my guns usin this method. Give it a try, you may like it.
Happy Trails!