So I can steady my aim a bit more. I was worried some with all the negative stuff guys said about micro groove barrels and lead rounds. Even with the under size rounds I had no leading I could see. The barrel cleaned out nicely mirror bright. When I do cast I use a 1 to 16 mix of lead and tin and the bullets are quenched in cold water in a bucket with a rag at the bottem. They were a bear to size at the original .457 . And I didnt use lube in the grooves. I used Lee Alox tumble lube with 2 coats and the powder through die helped to seat the bullets with out squeezing the lube off as they seated. I finished them off with a factory crimp die as well