Looks like it is Christmas in April for you.
The Hornady bullets are worth quite a few $$$ so right there,you owe the guy a large beer.
The lead bullets,I'd follow the suggestion to buy a bottle of Lee liquid Alox(well worth the investment considering the price you got the bullets for).
The cast SWC,depending on the .357 you will load them for,if too long for the cylinder can be seated deeper so as to crimp over the front band.That was a way of doing it before they (S&W)came out with a longer cylinder(mod 19).Just make sure to load below maximum since this procedure will increase pressure.Play it safe.