Ah- the #457193 is a Lyman mound supposed to be a remake of the original 405gr. My bro's mould of this number cast at 420gr. in the alloy I tried in my .458 Alaksan. Being a solid base bullet, I was shooting them quite slow. It has a very nicely shaped ogive compared to the RCBS moulds 300 to 500gr., which have short ogives and longer bodies & only vary in the number of grease grooves.